I just hate the massive W slow personally. Makes him way too good at both chasing and escaping (against multiple targets as well).
Imo reduce the slow duration from 2s -> 1s but increase the vision effect from 2s -> 3s.
Almost every game W is his 2nd evolve choice because the utility on it is just absolutely insane.
R evolve is also kinda nutty right now with nimbus cloak activating well before the stealth runs out, but I personally think hitting W evolve will do a lot more.
While yes Q does tons of damage, honestly, it should. I think his kit should be balanced around his Q rather than the other way around. His entire shtick is supposed to be preying on the isolated after all.