Buff Gragas - too hard to play and low reward for succesfully landing combos
He is among the lowest winrate champions now. Reasons are that his early game cooldowns are quite high and IMO Gragas actually is the hardest champion to use properly as you need handle the ult and flash combos or otherwise there's no point playing Gragas since what he does can be done easier with other champions. Nowdays I've noticed that it's nearly impossible to stay alive when pulling out a full combo because you have to go so close to be able to make it so you either die before, during or straight afterwards the attack. Gragas Q seem to be just too slow and low range you often can't poke with it without taking poke back.
The above regards to AP lane Gragas. Tank jungling is not viable at all. I can only succesfully play Gragas as a tank support right now.