Definitely gonna check out Bowser as a a main after seeing some of the matches. Bowser Bomb seems to have a LOT bigger area upon impact, Fire Breath is now insanely large, at least on startup, and it looks like Koopa Claw and its resulting grab and body slam also have a much larger area of effect and knockback.
Bowser's weakness was always that he was a big target with some range problems. It now appears he's got more range on his fire breath, and if you can't zone him out effectively, he's going to punish quickly and be able to knock most characters out at fairly low %s.