It sounds like I'm a Kim Winslow sympathizer in this thread, and I'm really not an advocate for ****ty reffing, but the Rousey/Budd fight, well...I've never thought that injury was her fault. To me, that was a similar situation to Josh Rosenthal in Mizugaki/Faber ... Rousey and Budd were belly down away from the action, and Winslow was checking for a tap, but nothing came until they were rolled on their backs and the elbow joint had separated. Tough situation to be in as a ref, especially since Rousey's last fight was mired in unnecessary controversy for an early stoppage.
I have a lot more to say about the King Mo thing, but I don't think my comments are worth a whole lot since I don't fight...I don't train, and I don't know what goes through someone's head in the cage to keep going even after they know their opponent is unconscious or unable to defend themself...it might just be instinct or the programmed expectation that the referee is supposed to stop them.