I disagree about the suspect chin. I dont think he has a granite chin the likes of Rampage or Anderson, but i dont think its suspect. His cardio has been a huge issue for him in the past but in the last few years since he's really began to have success, we dont really have a great example to show how good/bad his cardio is as of recent. I do think he has the ground skills to hang with a guy like Brock and even Cain, his TK defense has appeared solid as of late and his strength will certainly aid that, but even if he does go to the ground, he is far from a novice grappler. In think with the right gameplan and a few small tweaks in his game he could easily break into the top 5.