They'd be able t' do more than enough if SEGA doesn't get in the way.
Tails has digs befitting a mechanic, Sonic has a Naughty Dog scarf (has to be that way, they wouldn't work on the game otherwise), Knuckles' design actually matches his abilities, and Amy... ... ... did her design even change?
I feel the only semi-relevant complaint everyone is belly-achin' about is Knuckles' redesign. Semi-relevant might be givin' it too much credit as well, since I reckon most-everyone is whinin' solely 'cause no one likes change. T'is how I'm seein' it, anyways.