Vitor had only lost to Jones, Silva and Weidman in the last ten years. Jacare can do that to almost anyone, especially someone who doesn't have a great guard. Shogun isn't nearly what he was in 2010 but he put on a good performance, he landed two knockdowns and fought a technical fight. He isn't going to fight for a title or anything but he had a nice performance over a young up and comer. Anderson Silva lost to Weidman twice, and lost a razor close decision to Bisping in a fight where he knocked him dead and the fight should have been stopped. If he loses to someone much lower ranked then yeah, bump him down. I don't think you understand how rankings work, if you lose to top 5 guys you don't drop, nor should you. Pride was a bunch of freak show fights, some of which were fixed. Cro Cop was one of the top guys in the world there and got knocked out by everyone in the UFC. They has some great fights, a lot of fun ones. But the majority of them were one fights where guys had huge holes in their game which got exposed badly, a bunch of one dimensional fighters. MMA fighters are better and more well rounded than they ever have been, the sport has evolved over the years.
