I guess lee is healthy for the game..

And they nerfed blue buff just because Lee doesn't use mana.

I see that the "nerf Lee Sin" group is still shouting from the rooftops. Probably to be joined by the Zed nerf crowd soon.

I'll be honest, I haven't seen many Lee Sin's at my level so I don't really have a dog in this fight. However, I can say that I remember when I first started I was seeing Master Yi all the time and since I do a lot of "blind pick' games I'd see a Master Yi on both sides. And at first I thought he was a bit overpowering, because the good users of him could rack up impressive kill stats.

But over time I noticed that he is actually someone who can be defeated. It takes a bit of planning and an understanding of the limits of his powers, but I no longer fear him or consider him a real danger.

I expect Lee Sin is the same way. He's definitely strong and in the right hands can be extremely difficult to play against, but I'm not convinced he breaks the game completely. I'd suggest you look into how you can plan items to give you the burst you need to smack him down in games. Learn where the typical Lee Sin player ends up after his first run through the jungle and see if you can set up an ambush to gank him and keep him from snowballing.

Don't just keep coming here and screaming "Nerf! Nerf! Nerf!" Its almost as bad as being the boy who cried "Wolf". You need to see if you can fix it through stronger play rather than look for someone else to save you.

Actually, since his release, Lee Sin has seen no less than twenty nerfs. The fact that Riot tries to keep his kit viable and reliable says they believe him to be healthy for the game as a whole.