been playing him a bit recently and if you get rolling you can just steamroll everyone due to just being unkillable. WIth Q being % damage and E being a steroid+reset even his clear doesn't feel that bad going red>wolves>blue>gromp. For these same reasons his dueling early on isn't terrible either.
thoughts
And how is he gonna gank? Deal with counterjungle early?
His early ganks and pressure are pretty terrible compared to other junglers. It's hard to get a lane snowballing with him, or even keep up in pressure with the other top meta junglers.
He has to back a lot before 6, since he may be Mundo, but he's not invincible. Though his E's damage when he's low can surprise the enemy Jungler, letting you get a few cheese kills.
If you get invaded you're donezo. He's more vulnerable to ganks than even Amumu or whatever weak early game jungler.
