I can't believe I'm being trolled by a Sonic fan.
But yeah, saying that SA2B isn't really a sonic game because all the levels were just racetracks in the sky makes absolutely no sense. Unless you're saying the Sega Sonic games also weren't Sonic games because they have no linear order and are just a bunch of race tracks on the ground with obstacles that you have to jump/air float through. And also, there's no level that is entirely light dash/homing attack. I can only think of two spots that REQUIRE light dash. Most of the time it's just the fastest route involves those things. But fastest =/= only.
You entirely miss the point if thats what you think. If the only way you can prove that SA2B remains Sonic-y at all is because it has Sonic in it you don't understand the consistency throughout the series and probably never cared about the older games for the reasons I did.
Also I never said all levels required either mechanics (Which a lot of levels most certainly do require at least one of them) I said if you stripped them away you'd have an even more shallow game. Thats because they're BUILT around those mechanics and not on the same type of platforming previous Sonic games were built around.
The older games weren't "race tracks" or "obstacle courses" because they had a sense of location and atmosphere as well as exploration and platforming. They were full of multiple layers and simple high/low routes that even made backtracking plausible in S3K. If you fell down somewhere you'd end up at a new location(The dreaded bottomless pit argument). Adventure 1 simply translated those areas into 3D, while SA2 copped it out completely. Instead of trying to fix the problems that arose from creating a 3D Sonic game complete with 3D physics, they simply eliminated the parts where trouble could arise and made a linear action game. Physics too troublesome? Too hard to translate the feeling of momentum? Just fill slopes with boost pads, add rails and robot bashing, hell just get rid of everything around the stage it makes it easier for us. Now when you fall down somewhere you won't find yourself in another part of the level, you just die.
If you stripped away Sonic what resemblance would you have to even call it anything like the previous Sonic games? Nothing at all really. It looks nothing like one. Now normally thats fine if you wanted to call it innovation, but the actual result shows a degrading of it and marks a turning point in the quality and gameplay of the rest of the series. They simply gave up and started catering to the new legion of fans who clamored to it off the Nintendo wagon. They tried to pay homage to the 1st Adventure with 2K6 and failed miserably, and now they're just a shallow market-driven team because fans couldn't show them that putting their passion into a game was worth any money.