Fine (for now at least):
Fox - I can't think of anything that needs to be changed about the spacies. They can be the absolute best, but only if you have high technical skill. That seems like the perfect goal
Falco
Wolf
Mario - P:M did the plumber some justice. My new favorite character
Diddy Kong - solid just like Brawl
Marth - Not as good overall, because others are better, but still a force to be reckoned with
Peach - It's a shame that Armada has moved to the Pit side, but White Peach at Xanadu...wow
Lucas - The "new spacie" in my opinion
Link - Has all the tools to win
Mewtwo - Gold-armor costume, omnidirectional float, tail juggling, 'nuff said
R.O.B. - The game's only air dash is pretty freaking awesome
Roy - Still the slower stronger counterpart to Marth, but actually usable now
Ike - Even slower, even stronger, but Quick Draw shenanigans and some easy kill combos make him pretty good
Sonic - And people thought Captain Falcon was reckless...haven't seen much use since 2.6 changes, so maybe some of those need to come back? I don't know, I wasn't around for Sonic 2.5
Yoshi - Still don't get the "Yoshi is God Tier" hype, but he seems just fine to me
Ivysaur - Lost use after nerfs in 3.0, but still viable I think
Charizard - Solid character, decent use, should increase with time
Squirtle - He's last on my tier list, but I don't know what to do with him that doesn't make him OP
Wario - Very solid, like a heavy character with Jiggz's air mobility
ZSS - Fast, okay kill power, great combos
Pikachu - seems fine to me
Ganondorf - Is it just me, or does he seem like a bigger target than in Melee? Maybe it's just me...
Time:
Snake - We need more Rolexs, more intelligent devoted Snake players. Imo, Snake is one of the best, if used properly
Sheik - Sheik has to adapt, especially with d-throw and b-throw changes
Pit - After Armada's Apex showing, it won't be long before everyone (*cough*meToo*cough*) plays him
Ice Climbers - once again, just needs some time to adapt
Kirby - If Kirby is REALLY top tier, I have yet to see it. I've seen some good Kirbys though, so we'll have to see if he needs buffs/nerfs
Captain Falcon - Need more devoted Falcons
Jigglypuff - Jiggz struggles in P:M, I find. Not sure what would need to be done. Maybe she needs a Hungrybox-esque innovator
Samus - Samus has some of the coolest changes (with her fire/ice taunt change), so I'd love to see more people pick her up
King DeDeDe - Much better than people give him credit for
Lucario - radically different play style than anyone else, so it'll take time before we have someone truly master him
Luigi - <3 Where is the love?
Buff:
Bowser - Bring 2.6 Bowser back! He wasn't OP, he was just new. No one knew what to do. He just needed time.
Donkey Kong - I think his moves need to be just 1 or 2 frames faster. It's so hard to do things with him because of the high startup lag
Olimar - He needs another Pikmin, that's all. 5 is the right number
Toon Link - He's like a weird combination of Toon Link, Young Link, and 64 Link. PMBR should try to stick to one of these (preferably not 64 Link)
Zelda - More aerial mobility and a better jump, that is all that is needed. She is very good defensively, but she doesn't have the tools to MAKE people approach. Melee Jiggz could bait with aerial pokes. Zelda has...Din's Fire?
Mr. Game and Watch - I think his hitboxes need to last a bit longer. He supposed to be a weird character, and I don't think he's weird enough. I also think his up air could be a bit stronger
Ness - They made the right buffs, but not quite enough. PKT2 needs to go even farther, and the yo-yo needs to be even stronger (both up-smash and d-smash)
Nerf:
Meta Knight - I don't have anything specific, but I have him on close watch