I really hope that they leave in the option to have the camera be just as it is, because it's great just as it is and does not need to be "fixed"!
Seriously, I'm now about 10 hours into the game, and still have no clue why people are complaining about the camera. Literally my only complaint about it is that after going through a door it's a bit annoying that the camera faces the door instead of forwards, so you then have to spin the camera around or run into the screen to go forwards, but that's really minor; otherwise the camera is great, and is almost always right where you want it to be. And in the rare cases that it's not, there is the center camera button and right stick there to easily fix that; the camera is not an issue. It's very much like a Rare N64 3d platformer camera of course, but Rare's N64 3d platformers had pretty good cameras, so that's just fine. (And for anyone who forgets what a bad camera in a 3d game is like... well, try most any 3d Sonic Team game released from the mid '90s to the mid '00s...)
The one thing I really do hope that they put in is a quick restart option for challenges, because it's annoying to have to wait around for what can be quite a while for the race to finish, or platform sequence to finish, or what have you, AND then go all the way back to the start point, before you are finally allowed to try again. A quick restart option in the pause menu would be great.