I personally wouldn't judge things basing on FPS-problems right now, specially when it's not the final product we are talking about.
Sure, that would ruin the game, but it has an chance of being fixed, in contrast to the aweful gameplay idea with the Werehedgehog (or whatever they called it...).
That "innovative idea" IS final, and this alone ruins the whole image of Sonic, even more than the picture where he holds a sword imo...