I'd like to see some evidence that Lee Sin is actually a problem
That link is for Lee Sin's Diamond solo queue performances for the last month. The much maligned
is actually doing slightly better. I understand that there's this "story line" that Lee Sin is crowding out other champions but it sure looks like we've all just succumbed to group think. We're fooled by the early game power into thinking that's all there is. Maybe the real story is that Lee Sin's late game is so bad that his early game power doesn't make up for it? Right now, the two highest win rate junglers are
(for everything below platinum) and
in Plat and
/
in Diamond.
Jarvan's power could use a slight brush to it but, really, his win rate of 52.8% isnt exactly dominant. Nunu's at 54% and the chorus of call for Nunu nerfs is pretty tame.
Lee Sin just doesn't seem to be a problem. Let's let the meta resolve a little bit while also gently buffing certain tank junglers one at a time. I don't think we need a crazy broad fix. Just enough brushes to smooth out the rough edges.
Edit: This might even be a better link. http://www.lolking.net/charts?region=all&type=jungle-matchup&range=daily&map=sr&queue=1x1&league=diamond
that's the jungler matchups. You can see that Lee Sin is literally a losing choice in virtually every head to head jungle matchup AND you can see that Jarvan's win % is largely as high as it is because of his very favorable matchup to Lee Sin.