Fizz's E should deal damage on first cast

I don't know why this champ has a skill that makes him untargetable, gives him mobility and deals a shit ton of damage in an AOE on a 7 second fucking CD. Look at every other untargetable spell and see their hard limitations.

So his E should really deal damage on the first cast when he slams down, not when he hops again, so he actually has to choose between using it for damage, to engage, or to escape. Not all 3 at ONCE.