Volibear needs to be looked at.
I played 2 games vs a volibear today, one directly VS and the other I was the jungle. 1st game I was vlad, I helped my jungle leash, Voli did not so he hit level 2 about 15 seconds before I did. because of that, he also hit level 3 first, and since he hit level 3 first, he just all inned me and killed me, I didn't have pool yet so I was powerless. I simply TP'ed back to lane played a bit more passive, and started to farm. As soon as the wave got past tower, he flew out of a bush with a stupid amount of movespeed and killed me again, didn't even matter that I had pool didn't even pop his passive. I soon ask our udyr for a gank, Keep in mind we have only a difference of 20 CS but he has 2 levels and 2 kills above me, udyr has been farming like a madman so he is only 1 level behind voli. Udyr runs in, stuns him I put my ult down, I just do a standard combo to kill him, all the while udyr is fighting him too, Instead of running away he fights, and walks away with a doublekill. didn't even get low enough to proc his passive too. He proceeded to nearly instantly Kill our adc alone, and walk out. we lost that game. The second game I was jungle zac, Voli was top again. our lulu killed him twice, so she was far ahead in that lane. At around 12 minutes Volibear starts to kill the ahead lulu 1v1, and after lulu got killed 3 times I decided to try and shut him down, I E'd in got lulu ulted and we were just doing everything to kill him. he walks away with a double kill because he is 1 kill ahead of lulu. we lost that game too because voli did the same thing as the other game.
TL:DR Volibear snowballs off of anything, and he snowballs as hard as akali or kat too. while being far more tanky and still dealing good burst. He needs to not be god after 10 minutes of getting good to subpar farm.