Why I'm against all these "Nerf Lee Sin" topics
Please read this before you immediately downvote it.
I have a class so I'll try to flesh this out more later. But in all honesty, I'm perfectly content with Lee Sin's current position. And here's why.
First, you guys are talking and talking without end about how strong he is. He's incredibly mobile, has game-changing crowd control, and crazy move speed and steroids that give him power. He's "seen every game" and is a "top pick in both professional and solo queue." He's "dominating the jungle" and needs to be nerfed because of his perceived power.
This is simply not true at the moment.
Yes, he is incredibly annoying to play against, incredibly difficult to chase (if not impossible) and his disengage in duels is so strong that you are most likely not going to kill him, even if he gets caught out. Yes, his scalings are very high. Yes, on paper, he is incredibly strong. But right now, he is absolutely not dominating the jungle at any level of play, unless you consider "dominating" to be overpowering other junglers rather than simply percentage play rate.
Lee sin has an incredibly bad win percentage at both low and high elo solo queue, and poor win rates in professional games. Yes, I do know that win percentages aren't everything, but they certainly are not something to be ignored. Lee Sin is not winning games. Period. Even by people at the professional level with thousands upon thousands of games with him and know his mechanics perfectly. Why? Because right now, he is not dominating the jungle.
His win rates fell. Fair enough. And to some, that isn't enough. I agree. So let's check out some other statistics. How about pick rate? You all are tired of seeing him every game. In the last month alone, Lee's popularity at professional level play has dropped over 15%, and is continuing to drop. Meanwhile, Vi's popularity has increased by a tad over 13%, and Rek'Sai's has increased by 11%. Professionals are picking these champions (and J4, who's popularity is also decreasing, which I found surprising) over Lee Sin because at professional level play, Lee Sin is in a much weaker place than these other junglers. Nobody talks about Vi. I'm baffled as to why. She's winning more games by a huge margin, and she's considered much stronger than Lee in many areas. Vi is dominating the jungle right now at pro level play, not Lee. In fact, in the last two weeks, Lee has been picked less than half the number of times Vi has in games.
I realise Lee is annoying as hell to play against. I realise his mobility is whack. But the hard, cold, raw data is showing that this is nothing more at the moment than perceived power, not actual power. Win rates are not everything. But when even the best of the best Lee Sin players are losing more games than winning, win rates do show evidence of weakness. Annoying does not mean powerful. He is powerful, yes. He is annoying, yes. But no, right now, he is absolutely not overbearing. No, he is not dominating the jungle. He has been falling out of favour during the last month and is still continuing to fall out of favour in high level play. Soon, because people follow professionals, he'll drop in low level play as well.
I'll amend this and make edits when I'm out of class. But this is my stance. Like it or disagree, I don't mind. I'm trying to be objective and do nothing but give out hard statistics. And unlike a human's bias, statistics do not lie.
He's not out producing damage that can turn a fight.

Identical.