Let's assemble a list of stages that a stage liberal would allow in competitive play, and see which stages are the most arguable and which are the least. I'm not sure how much this will help but it will at least be interesting to note what stages could be legal to some people, and illegal to others.
- Final Destination
- Battlefield
- Big Battlefield
- Mario Galaxy
- Mushroom Kingdom U
- Delfino Plaza
- Luigi's Mansion
- Mario Circuit U
- Kongo Jungle 64
- Skyloft
- Norfair
- Woolly World
- Orbital Gate Assault
- Lylat Cruise
- Kalos Pokemon League
- Pokemon Stadium 2
- Gamer
- Coliseum
- Castle Siege
- Halberd
- Town and City
- Smashville
- Miiverse
- Windy Hill Zone
- Wii Fit Studio
- Wuhu Island
- Duck Hunt
Oh...wow. There's a surprising amount of stages that are arguably legal, although I doubt that even 50% of these stages will make the final cut.
Candidate stages you missed are Jungle Hijinx, Garden of Hope, and Pilotwings. (Yes, camping issues, but this is a perhaps outlandishly liberal list.) Also Miiverse technically isn't a thing yet so I'd remove it. That's 29 stages total. I'll be honest, that sort of stage list would be a wet dream for me. But I'm (mostly) realistic and know there's no chance of a good chunk of them being accepted. Even so, here are my thoughts on each of them. For the record, I believe in a simple legal/banned dichotomy and think the starter/counterpick distinction is utter rubbish, so I'm not even going to bother with the latter.
Battlefield: No way is this ever getting banned.
Big Battlefield: Too large for singles IMO, so banned there, but it should be fine for doubles.
Final Destination: Again, no way is this ever getting banned.
Mario Galaxy: It's a walkoff and thus utter poison to most people. The gravity also curves most but not all projectiles, and the inconsistency is jarring to some, although it's far from impossible to learn and adjust to. Now that chaingrabbing is gone, every anti-walkoff argument I've seen revolves around hypotheticals and "such-and-such
might happen," which is very shaky grounds for a ban. If camping near the blast zone fishing for throw kills proves to be a degenerately powerful tactic then by all means, ban away. But I will not support a stage ban without evidence.
Mushroom Kingdom U: Nabbit is the big question mark. The transformations are all relatively benign and most of the hazards are simple to avoid. If @
Ben Holt
is to be believed, Nabbit is escapable even over 100%, a point in the stage's favor. However, from personal experience, Nabbit is still a major distraction even if he never actually catches anyone. I'm in favor of allowing this stage until something or other proves to be overwhelming, but I suspect it'll end up banned sooner. (Or later. But probably sooner.)
Delfino Plaza: Returning stage from Brawl. The main issue with it there (Meta Knight) was fixed. Therefore it should be legal. Complaining about the water is silly IMO since no character in the game relies on spikes for a kill.
Luigi's Mansion: An interesting mix of high damage potential and high survivability. The ceilings let player rack up huge damage on each other if they fail to tech or tech badly, but the same ceilings can let them survive otherwise fatal hits if the angle is right. (Or wrong.) The fact that the mansion is destructible is a point in the stage's favor, since it gives a unique importance to stage control in cases where one player wants the mansion intact and the other wants it destroyed. I'd like to see this legal.
Mario Circuit U: The worst thing about this stage is the weird glitches that seem to instantly kill players. The track itself forming a wall or ceiling is temporary in all cases, and when the stage is in motion one can predict when the track will be close enough to be a hazard since the stage never deviates from its path except to set players down at one of the transformations. I do not believe there is any character in the game that is so one-dimensional that a single wall or ceiling shuts down all of their kill options. I say legal but acknowledge that others dislike the stage.
Jungle Hijinxs: If this were just the foreground stage it would be a shoo-in. Unfortunately Sakurai likes to mess with us and introduced two-plane stages. Circle camping between the two planes shouldn't be an issue between the barrels exploding on players who try and use them too much and one plane or the other crumbling away temporarily and forcing a retreat to the other half. (The relief barrels provided in these cases are immune to the exploding effect, BTW.) There's a spot in the background that's a suspect for camping potential, but I'll reiterate my stance that I like to see evidence before supporting a ban. The background also has an inherent high-knockback property to account for the larger area. That said, I do expect that this stage will end up banned regardless.
Kongo Jungle 64: Smaller than Melee (or perhaps the player models are just bigger) and I believe the moving platforms go a bit higher as well. That means the camping issues are fixed except in perhaps the most extreme of cases like Peach or Jigglypuff vs. Little Mac or Ganondorf. The barrel is no worse than Randall. Legal.
Skyloft: Probably the best of the 3 main travelling stages. Some of the transformations would be sketchy as standalone stages, but their transient nature means any negative qualities are basically impossible to exploit in a meaningful way. Walkoff camping in particular is just not a thing since doing so leaves you in a terrible position when the stage moves on. Legal.
Norfair: I note that a lot of people who complain about this stage like to single out the large lava wave from the background but fail to notice it can be shielded, spotdodged, countered, and so forth. The lava jets can likewise be shielded although their hitbox lingers quite a bit longer. With the new ledge mechanics, planking is no longer a thing and thus the large number of ledges is not a negative aspect. I say legal.
Woolly World: The walkoff is temporary, so camping it is not a good idea in general. One problem solved. The platform layout is...awkward, to put it lightly, but I haven't seen any examples of successful camping. The worst you can really say about it is that it's very well suited for aerial fighters and that it's big. Even if it's too big for singles, I would like to see people try it out for doubles.
Halberd: Legal in Brawl, Meta Knight is fixed, therefore legal again.
Orbital Gate Assault: I'll be honest, I don't personally like this stage after playing on it a few times. However, it's completely predictable and acts the exact same way every time. It's literally Poke Floats in space with explosions. I therefore support its inclusion.
Lylat Cruise: Legal in Brawl, no reason to ban it here. The tilting is complex but not random, the ship moves in reaction to whatever's going on in the background. It's a complex pattern to be sure, but it's a pattern nonetheless.
Kalos Pokemon League: One of my personal favorite stages. I'd love to see it legal, and again reiterate my stance of "don't ban without evidence," but the sheer number of hazards does not leave me hopeful.
Pokemon Stadium 2: Tripping is gone, so the Ice form is basically fixed. Wall infinites are gone, so the Ground form is fixed. Everyone falls faster, so the Flying form is easier to deal with. And the conveyor belts on the Electric form move slower, so that's fixed too. I say legal.
Coliseum: As I said on Mario Galaxy, I'd want to see evidence of people successfully abusing walkoffs before I support banning them en masse. Another concern that I didn't touch on earlier is certain combos or strings carrying players across the screen for a kill. However, the platforms on Coliseum rise from the bottom and thus can potentially disrupt such tactics. Thus I think Coliseum needs a close look.
Castle Siege: Legal in Brawl, no reason to ban it here. Transformation time is both faster and consistent, yay for improved hardware.
Gamer: Unusually fun, not at all what I expected. 5-Volt is a powerful hazard but also quite easy to avoid. Even throwing players into her line of sight isn't always easy since it only activates at a precise moment. Caves of life formed by randomized stage geometry are a concern but it's possible to No Contest and try again until something acceptable turns up. I'd love to see and/or have some honest matches on here to see what it's like. I doubt it'll ever be allowed but I can dream.
Garden of Hope: The Peckish Aristocrab is honestly pretty big and it's sometimes hard to properly time a dodge or similar evasive maneuver. That said, I'm sure players with more skill than me could avoid it consistently unless someone else hits them into it, and yet again I state my dislike of banning a stage based on maybes.
Town and City: The lovechild of a
menage a trois between Battlefield, Final Destination, and Smashville. (Seriously, it has a bit of all 3.) Legal without question.
Smashville: You're kidding, right? Legal.
Wii Fit Studio: See Coliseum minus the bit about platforms disrupting combos. They come from the ceiling here, so they have less of an impact that way. (Speaking of which, they vanish before reaching the upper blast line, so anyone standing on them won't get killed.)
Duck Hunt: The ducks are no worse than Shy Guys on Yoshi's Story or Yoshi's Island Brawl. The dog has predictable timing based on player (in)action toward the ducks, and its location is likewise predictable. The tree is a possible camping spot vs. Ganondorf, Little Mac, and other bad air fighters, but again, evidence is needed to support a ban. Luckily this stage seems to be in vogue right now and I don't forsee an issue there for once.
Pilotwings: Like Jungle Hijinxs, this is a two-plane stage. (Sorry...) Unlike every other time I've harped on about evidence, this time we actually have it! Therefore I'm content supporting a ban due to camping under the wing on the red plane and on the engines of the yellow plane.
Wuhu Island: As I said about Skyloft, a lot of the transformations would be sketchy on their own but their transient nature means it's impossible to really exploit any of them. The glitch on the boat is very hard to replicate and is apparently character-specific to boot, so I don't think it should meaningfully impact any legality debate. I support this stage being legal.
Windy Hill Zone: Camping the windmill is difficult at best since the platforms move and force the camper to change position periodically. The rest of the stage is big but has little going on other than the springs, which in my experience are rarely an issue as long as one remembers they exist. Even if the size is too much for singles, I'd like to see people try it for doubles.
...so yeah, the tl;dr of all that is basically "proof or GTFO" for every questionable stage ever.