Blitz crank has an unhealthy hit box on his Q.

unhealthy? as in too small? you have to understand, as a blitz main... there are way too many nerfs on blitz now. if you're complaining about it being too large of a hit box you better point out the cd on his passive, all his mana costs, and his flat stats all being kinda shit. plus lets point this out, since aram, everyone has gotten a lot more effective at dodging that shit.

Are you saying it should be nerfed because it's too big, or is your issue that it's larger than his fist so is a clarity problem?

It's not his hitbox, it's his champion design in general.

His damage is far too high for something that's supposed to be a utility support (because he was not designed with support in mind). The ability to pull people over walls and to his team (which is 100% unique to this champion, I might add) is such a high reward for low risk.

His damage output on his ult (and the cooldown) need to be tweaked. A lot. Or there needs to be a real punishment for missing Qs. The slow on W is useless. I don't see Blitzcranks W in to get a pull, I see them W in to punch someone in the face and THEN Q them when they get two steps away. Missing a Q should make him "break down", rooting him for 1.5 to 2 seconds. Now THAT is some clear risk / reward.

I wish his hook was telegraphed like Thresh. He's a really oppressive support.