Personally, I would like cooldown to be a smidge shorter, or maybe have Moto Bugs be a little more spammable than the other more devastating assists since they're basic weak cannon fodder and could be Sonic's 'weak Hadouken' while waiting for the true baddies to regenerate.
Tails should not be on the same 'assist cooldown' timer as his other assists since he's always behind Sonic. Please tell me a grab is coming in the next update. Sonic's melee game is really awkward without one and he's pretty much forced to use kicks only or the crouching hazards. Huh, since no one else ever gave some feedback, I guess I can give a amateur attempt at things I could see needing to be fixed: