That's just people overreacting. First its oh we hate 3d Sonic game we want a sidescroller, so they get one and complain when the game is still being made and can be fixed and still in testing.
Besides check this out
http://www.xbox360achievements.org/game/so...1/achievements/
Golden Flash
Clear all Acts as Super Sonic 10G
Sooo that tells at one point you can use super sonic in every level