I feel that quick-step and drift are both unnecessary gimmicks that exist at the expense of other gameplay elements; Sonic Team gimped the way that Sonic handles so that they had an excuse to add something new to the formula where it really wasn't at all needed - and it makes the controls ridiculously complex for a game in a franchise that initially prided itself on using only one button.
So, that's half of Modern Sonic's move set gone - and it leaves this:
A tightly controlled 3D Sonic platformer with a more tempered speed, less linear, more open level design, spindash as opposed to boosting and a decent balance of mobility at all velocities - and THAT sounds like a great ide-Spoiler
Sonic Adventure 3, anybody? *shot*
I don't think SA2 is the best example, as it was quite linear, and did not have much platforming. If anything, you were describing something closer to SA1.