The Brawl reviews all praise the overall gameplay. A couple of them do notice the speed difference but there aren't any complaints. The fact that some don't even mention it is a testament to how natural Brawl's physics engine feels.
http://archive.videogamesdaily.com/reviews/wii/super-smash-bros-brawl-p1.asp
Here is a negative Brawl review. It reads like something that could have easily been written by someone on smashboards.
Now the Melee reviews generally praise its gameplay as well, but many of them complain about the speed. Obviously that seemed to be the prevalent thought since Sakurai decided that the pacing of the game would be toned down back in Brawl's early stages.
I think there is a comfortable middle speed-wise between Melee and Brawl. Some things in Melee happened so fast you couldn't really appreciate them before other things happened, and I recognize that. I liked the addition of hitlag, and I rather missed it in B+, but then I think the wrong people are in charge of B+.
Suppose you took Brawl, upped the speed a bit, maybe 10-20%. Made Tripping optional. Increased hitstun enough to facilitate combos, and maybe added some extra moves.
-differentiating fsmash and bsmash
-differentiating ftilt and btilt
-changing many characters' specials to make them more important to their playstyle. Mario for instance - instead of downB doing the stupid fludd thing, it could cycle through his powerups in Super Mario Bros. games. Raccoon/Fire/Boot/Hammerbro/Bee/Whatever, and that changes his neutral B. Similar things for other characters. Give them some sort of wacky hijinx with their specials. That is REAL depth. It's also fun depth. It adds to the re-playability of the game for all types of players.
On top of that, I think real ATs could be incorporated without posing a major technical barrier for new players.
Suppose some type of slide were added? Maybe holding Z and dashing causes it. Some kinds of conditional cancels. Certain moves have IASA frames into certain other moves. No extra button reflexes needed, just knowledge of the character. Make all the changes I'm suggesting, and you're already looking at a deeper game than Melee or Brawl. It's starting to sound closer to Guilty Gear or Virtua Fighter.
A skilled player is familiar with the game or has the dedication to spend time improving their ability. They have a much higher tolerance to frustration than a beginner. They're familiar with the game enough to react fast enough to most things (unless they have terrible reflexes).
I'm going to rely on anecdotes here. Personal ones. Me for instance. I started playing Melee months before Brawl came out--Literally had not heard of Smash Bros. before that. Yes, I lived in a cave pretty much. I have terrible reflexes. First character I ever played? Falco. I never switched.
I learned the game with
-small ledge sweetspots
-high gravity
-high speed
I became proficient at all the basic aspects of the game by the time Brawl came out. Obviously I couldn't wavedash or l-cancel, so since Brawl didn't have any of those you'd think I would be the ideal target audience for Brawl.
Surprisingly not so much.
I got bored of Brawl after a few months of trying to find combos and slowly accepting that there weren't any. The game had too much run/hit/run/get hit/run/hit/run/get hit. Without items it's all defense. I switched to Brawl+ when that came out, and got into Melee again after that. Haven't played regular Brawl in a long time and I don't intend to.
I spent a very uncomfortable month of my life teaching my retardedly slow fingers to wavedash, jcshine, and shffl, a year after Brawl came out. Why? Because Melee was fun enough for me to make sacrifices for it. A month of playing Brawl is even more aggravating, because your inability to beat your opponent is not something you can change. It's a dead end, and you reach it too soon.
Now, assume the default speed of SSB4 was around the same as it is in Brawl. Assume there was also a speed switch that lets you modify speed by percentage (as low as 20% and as high as 500%). While we're at it, do the same with gravity or even hitstun. Throw in the option to save the default settings of the game on top of that.
That sounds excellent, and I hope that's the direction they take. I think the ideal speed is somewhere between 105-120% of Brawl's. Choices are good. But I severely doubt most casual players would agree with your philosophy about ideal gameplay. I'd be willing to bet they'd have tripping off, hitstun up, gravity up, and speed up just like they already do with stocks and items usually.
Although I sometimes turn the items on just for the heck of it. They're nice to have around. Options are good. I certainly won't knock your solution.