Maybe, but he had the fight won if he didn't choke at the very end. He was easily winning the fight, it's not like he was getting embarrassed in the Octagon.
I still think CTE or other concerns would be valid at this point. Presumably, he's going to end up with problems, and perhaps if he stopped now and focused on reversing damage, that wouldn't have to be the case.
I'm not positive about that...I'm just saying, it's possible, and as a heavyweight fighter, I think he is at far greater risk than those in the lower weight classes. Georges St-Pierre was saying that training for his middleweight bout with Michael Bisping required training with heavier/larger men, which made the risk of injury greater. That makes sense - how strong can some of these welterweights be? Very few welterweights could punch as hard as Johny Hendricks, for example.
Look at Overeem's lip...this is worse than the photo above of Robbie Lawler from his Rory MacDonald II fight at UFC 189. Yikes: