I think they kind of did that in Generations with the way Super Sonic flies over everything, but that just makes levels boring and you never have enough rings to enjoy it. But I think the flight has something to it - maybe if there was a "Super Sonic Path" where you just move impossibly fast (like so fast you'd never manage manual steering) but the game kind of auto-steers for you, at least a little bit?
It sounds lame, but it would be a Super-Sonic-only kind of thing. I dunno.
i think that if they wanted to keep it in, this is how they should do it. make it so fast that you don't even care that you can no longer actually control the character.
as the year gets closer to an end, i'm starting to think that the reboot speculation is more and more likely. shouldn't we have heard something by now?