New to warwick and I have some thoughts.
Overall i like this champion for jungling. His First clear is extremely easy with all the heals, and high damage. His ult is low damage early, but really good cc of course.
However it seems weird that his E is just a passive. You dont ever turn it off really. It seems weird, especially considering there are so many champions now with 2 passives in the passive slot. Maybe replace that ability with a light close ranged aoe slow? It feels kinda weird trying to stick to people without a slow to autoattack anyways.
His lifesteal is broken tho.