Ok, I have to weigh in on this one. Almost never post, but oh my, this one deserves a comment. Just ended a ranked game with enemy Mundo, and I thought I've seen broken and imbalanced - until now.
From the graphs you can see my team was generally better. My bot was a lot better, I was quite fed and tanky too. We had a bit more team kills, better objective control, more barons, but my god - that Mundo...
He was just splitting top whole game basically, amassing farm and occasionally helped Lee in river. We were doing good job but after he joined his team, it was game over. You can see from the graphs the dmg output he did. He bought the Hydra at the end, so most of the dmg came from him being pure tank.
I was trying to 1v1 him with my Skarner - he was melting me like a butter. At one point, 4 of us were on him and he was running circles around us - just pure unkillable monster - and his health kept coming back. And no - no amounts of Grievous wounds would help vs him.
This champion is dishing out the dmg output worth of 2-3 champions while building full tank. How is this possible? No one can see it? I mean, I get it - he is supposed to be like that, but seriously - this champ needs rework and he needs it badly.
Here are images from end game screen:
End game screenshots