Mundo needs a W change

Ok first off I want to say the E changes on Mundo were nice. The W tick change was also good.

Now Mundo at the moment isn't OP or UP. So I dont want a nerf as much as a buff.. he is fine Riot did fine balancing him.

My only suggestion is a change to his W late game. Early game its dangerous to keep it turned on while late game you out heal the health cost of it. I wont be making any suggestions except that his W should not be kept on late game with no health costs.