Zerker seems a bit overbuffed, take away guaranteed heavy after GB? So (s)he can get back into the infinite chain/feints after GB. The character should still feel like a challenge...
How about every assassin loses the ability of a heavy from a gb? That would be fair.
Well, it can feel "earned" for some characters, especially when it doesn't start a chain. With berserker it's just heavy damage AND chain opener.
