Does Mundo need a buff?

Yes, S5 is the tank meta, but i feel like Mundo didn't benefit from this meta unlike the other tanks. He still have a low win/ban rate, rarely do you see a Mundo in a game, and i figured he might need some help. IIRC in 5.8 RITO gave a little buff to Mundo, where his Q would give full HP refund if it kills a target. Now that helped his early-game a bit, since usually Mundo can't do anything except last hitting with Q pre-6, and losing HP while you are csing is not very good. Especially when Mundo is already weak early game. I appreciate this little buff, but i still think there's something missing that prevents Mundo from being a very good top/jungle pick. Mundo is weak in the laning phase, especially against strong early-game champs like riven. And while his late game does make it up for his early-mid game, it is very easy to lose your lane when your opponent knows how to play against Mundo. Late-game is where Mundo shines, at 6 items he is very hard to kill as long as you don't run into 3 enemies with bad timing to pop your ult. As impressive as the hp regen stat on his ult may look, it's actually not that strong, ignite and grievous wounds can make his ult useless. His W doesn't deal that much damage unless you get liandry, his E is the strongest AD steroid in the game but you can't really AA your enemy too many times late-game. Overall there just seems to be something missing. Apart from his cleaver, he's just a sponge that soaks a lot of damage. His damage and CC is too weak compared to other tanks. I can pick Maokai over him anyday. So what do you think? Does Mundo need a buff?