User blog comment:RoznosicielCiast/The topic that has been discussed endless times - A fix for Lee Sin/@comment-2112140-20141230174452

I think the biggest problems with Lee are:

1 His ultimate. It has a very short cooldown late game, considering you get CDR from Juggernaut enchantment, runes, maybe even masteries. It also deals very high damage and the knockback is huge.. I agree with your fixes but they could also reduce the AD scaling..

2 His W. The shield is fine. I have no problems with it. However Iron Will is just BS.. Just like you I agree that we need to remove the spell vamp but increase the lifesteal to compensate (perhaps a bit higher like 7/11//15/19/23%) Or they could simply apply your values and increase the power of the shield or add a bonus scaling.

3 True sight. As you said, he doesn't need it on Tempest or maybe it should be removed if you use Cripple (similarly to Resonating Strike)

4 His game transitioning. He begins the game as a strong early game champion, in the midgame he is still threatening. Late game he becomes an utility machine that gets enemies out of position, takes some damage and dishes out some damage.