Conor had his partying, recklessness, etc. issues as a result of fame, not as a result of losing, and I'd go so far as to say that his current situation has nothing to do with him losing a fight. Furthermore, as far as passing the torch goes, remember that Conor holding up the division came when he was champion, not when he had lost. As soon as he did lose his belt, he was no longer the one holding up the division.
Ronda, on the other hand, was doing great until she wasn't. She fell apart after losing the title, and she didn't "pass the torch" at all, at least not of her own will. The fact that Holm, Tate, and Nunes were active after she lost the belt had nothing to do with Ronda, and in fact, her first fight back was for the title. So don't act like Ronda went out quietly; she disappeared, and then tried to get her belt back later.