Regarding Lee Sin and his Balance
While I agree that he's pretty frustrating to deal with and rather powerful, I don't think that he should have his mobility nerfed. I think that his base damage isn't as much of an issue either, though I wouldn't be opposed to a very small nerf (say, 10/level or so on his E and Q, or maybe just one of them). I more have an issue with his scaling. I like the idea of a mobile tank with a strong earlygame. Lee Sin is really interesting and fun to play, and I think his high early damage, mobility, and playmaking potential are all really cool. I think that if his scalings were reduced by, say, 20% on his Q and E, and 40% on his ult, he would be a lot easier to deal with, and not oneshot your carry lategame with nothing but a titanic hydra.
in my games that wasn't smurfing. Just my two cents !