That fixed up Peach Model definitely looks good to me, But that's probably because I had been the one that fixed up a working model for Peach with the Twin-Tails, But still, Looks amazing.
Yeah, That's one of the reasons why in Smash 4, Sakurai cut down on how long a character could jump or float compared to Brawl, Because You'd have a easier time getting to the platform 98-100% of the time.
Jeez, That's a huge roster Tyshy. Since most likely, You're going to use BrawlEx for the Fighters, Mind if I suggest that you use the portrait slots of the original Brawl Fighters that aren't to appear in this game (Ex: Pit) as the main portrait slot of some of the New Fighters before you actually move to using the Portrait slots that can only be accessed from BrawlEx.
Hope you don't mind me saying this Tyshy, But just because there isn't any slots open for Generations 2, Doesn't mean there won't be another Smash Sisters that won't have atleast one slot opened.
You just do it the same way that you'd import any other polygon, Since by default, Peach has her Frying Pan, Golf Club, and Tennis Racket in her left hand.