Nono, it'd actually take more skill to obtain the benfits of thokking; not just mindless "JUMP THOK JUMP THOK JUMP THOK". For example, you'd require having to use a good aim; right now, you miss your target? Simple! Just thok more! Now, with my idea, you miss your target, you take the consequences. Death, being hurt, or just simply falling behind.
Ever tried hitting a thokking player in match mode? Yeah, it's hard as hell. Liken it to bunnyhopping in Quake, I suppose. It'd take more skill for the thokker do dodge a handful of shots; they need to get everything perfect, or they get hit. It'd be much easier (and fairer) for a Tails or Knux player to hit a Sonic who is skidding after a landing.
Also comes to balance; with Tails and knuckles, you only get one chance to dodge a shot, ight? Jump. It hits, or misses. With Sonic, you jump and thok. Two chances to dodge a ring (jump over one, and another coms flying at you in midair; just thok!), this makes it hard to hit the Sonic player; if they just do this repeatedly, good ******* luck. If they fail to thok in the right place, perhaps behind cover, then they're cmpletely vulnerable.
Using this, it would stick true to the "not good for starters, but when controlled properly, is the most powerful of the three". You'd actually have to be good to be able to control him properly.