So yeah, pretty much every observation on how Sonic controls I made based on the videos to this point were 100% spot-on. Sonic is just an absolute chore to control in any meaningful fashion. He's incredibly slow, turning him around is so unbelievably tight and stilted, and it gets even worse in the air, what with the lack of air momentum and all.
The sad part about all this is that the game actually has some pretty awesome level design at points, especially past the first level. If anything, the dudes making this game seem to have a general idea on how to do non-Rush non-Advance level design. What makes this sad is that all the levels are so obviously designed with Sonic's control in mind, which means that it can't really allow for any sort of challenging and interesting platforming set pieces because any attempts to do so would just frustrate the player completely.
And seriously, why why why why why is rolling completely useless in this game? Why does rolling slow you down on slopes? I run up to a loop in Splash Hill, instinctively press down as I'm running up the slope to start rolling, and Sonic just slows to a dead stop before falling backwards away from the loop. Seriously, what the hell is this? Classic Sonic gameplay just doesn't exist if you take such an integral part of the game and make it completely superfluous.
On the plus side, the game really does look quite nice, if a little rough at points. The homing attack works as it should, although the fact that Sonic controls so terribly means that you basically have to use it as a crutch to do... well, do pretty much damn near anything. It's interesting because when playing Megamix, I can pick and choose the spots to use the homing attack and let my momentum carry me the rest of the way. In this game, if you're not using the homing attack, you're simply not playing the game properly. This is not a good thing.
So all in all, pretty much what I was expecting. On the bright side, I look forward to the inevitable hacks of this game that actually turn it into something playable, so I'll hold on to that hope for the time being.
That's a damn good summary to be perfectly honest.