Lee Sin should be reworked, not nerfed
Currently Lee Sin has overwhelming mobility, high damage, slow, stun, knock back, shield, built-in lifesteal, and camo-reveals.
His kit is not only toxic but also jack of all trades, master of none all trades and there is not a single true counter to Lee Sin for that reason.
Nerfing him wont change the fact that he is very overloaded nor will it change the fact that there is no counterplay to his ward-W-R-Q-Q. If he were to be merely nerfed to no longer be problematic, he would have to be aatrox-ed. A rework is needed to fix his problems, not nerfs.
in the midlane who took a ward RQQ under tower and got murdered by
and 

and
are the three junglers who can keep up with lee's clears and gank at the same time as him in addition to the same scale of ganks.
or
after level 6.
in that he wants to counterjungle as much as possible while still ganking lanes every once in a while.

and all the champions with 2 forms (
etc) too then?