First look at Kayn on Youtube
it sems to me he could be played succesfully even by retarded people, i dont intend to offend anyone by all means.
avoiding enemies wardings with a simple click and move trough rocks seems pretty fucked up ,
unlike other champions which i find OP i actually like him, because of his passive, but come on, turn on the common sense and nerf his E ,let him be stuck inside the terain after few secs,until he can activate his ability again- or something :D
even if we see his sign on the rock , his control and speed inside the terain makes him rather unpredictable than anything else and in many cases unavoidable in ganks
ah now i realised i didnt even need to write anything but 1 sentence: his E makes his every gank overly creative, instead of the summoner
have a nice day :)