I just killed a Lee Sin trying to secure his red in his own jungle as Master Yi....

I was being sarcastic. Lee in his current state is perfect. He has no weaknesses. Hopefully Riot greenlights the rework and turns him into a carry. I'm tired of Lee Sin in his current state.

According to Nightblue3, Lee Sin is still Tier 1, he just needs a leash. I think it depends a lot on what skill you take lvl 2 and how good of a leash you get; Cloth5 has a very fast clear and low sustain for Lee, so I'm assuming they took E second, where NB3 says Lee has good sustain and decent clear, so I'm assuming he took W second. It's hard to really say for sure what's going on; general impressions I've had is that it's very difficult to gank lvl 3 unless you get a good leash and are playing a jungler with at least some kind of sustain/shield (For example, Vi used to have sustain issues, but she's surprisingly strong in this patch; I think her passive helps a lot. On the contrary, Amumu used to be very strong in jungle, but, contrary to what Riot seems to believe, he seems to have a lot of issues in the current jungle; he has a hard time with health and mana sustain without spirit stone)

My guess is if you play a strong early jungler with good sustain (like Pantheon), you can probably kill Lee lvl 2 in his jungle. No guarantees though :P

From what you say, that looks pretty promising if you ask me.

My first game on the patch I played Amumu jungle. I can attest it was quite rough early on. Later on he still clears extremely fast, but that first clear is rough, and he already finished his first clear low on health in the old jungle.

According to Nightblue3, Lee Sin is still Tier 1, he just needs a leash. I think it depends a lot on what skill you take lvl 2 and how good of a leash you get; Cloth5 has a very fast clear and low sustain for Lee, so I'm assuming they took E second, where NB3 says Lee has good sustain and decent clear, so I'm assuming he took W second. It's hard to really say for sure what's going on; general impressions I've had is that it's very difficult to gank lvl 3 unless you get a good leash and are playing a jungler with at least some kind of sustain/shield (For example, Vi used to have sustain issues, but she's surprisingly strong in this patch; I think her passive helps a lot. On the contrary, Amumu used to be very strong in jungle, but, contrary to what Riot seems to believe, he seems to have a lot of issues in the current jungle; he has a hard time with health and mana sustain without spirit stone)

My guess is if you play a strong early jungler with good sustain (like Pantheon), you can probably kill Lee lvl 2 in his jungle. No guarantees though :P

Of course. Every single jungler needs somewhat of a leash to not leave their first camp with 33% HP, even Warwick.,,