I think it's gotten a bit better, but they definitely seem to let it go a little longer when a big star is getting pounded. I'm not sure if it's any back-room agreement with the officials or anything conspiracy related, or just that the refs are also fans of the fights. In WMMA they are usually a little bit quicker to stop a fight when a girl gets KO'd. In Rousey vs. Holm, if Rousey had of been any other fighter on the WMMA roster, the fight would have been stopped right after the kick landed, but Rousey was given the chance to recover. She obviously didn't because she wasn't even on planet earth at the time, but I don't think they allow anyone else to take any more damage after that kick. It could be something as simple as the referee during the fight also bought into the Ronda hype, and was in disbelief and somehow thought she would recover.
Anyway, back to the Fedor-Maldanado/Brock-Carwin fights, I do think both should have been stopped, but I'm not part of the crowd that says Fedor or Brock lost those fights. The fights continued for better or worse, and they both recovered. I do think Fedor-Maldanado should be a draw though. I'm quicker to forgive bias from referees than I am to forgive bias from judges. There should be absolutely zero bias from judges.