Akiyama - I don't agree with you. As long as you have a name and you show up to fight, the UFC will most likely keep you around. Look at the British fighter Paul Taylor. He's 3-4 since joining the UFC, but they keep him around because he's exciting with almost of his fights being FOTN. Akiyama is only 1-2 with all three earning FOTN honors, and losing to Bisping and Leben isn't such a big deal. Leben has gone 11-5 since joining the UFC with wins over Cote, Rivera, Fioravanti, Santiago, Martin, Sakara, Simpson, and Akiyama. 2 fight losing streaks aren't that big of a deal, especially when he's fighting some of the best in the division.
Dan Hardy - Are you serious? Did you just compare Hardy to Leites? No, just no. Again, you might be looking too much into losing streaks. All fighters have them. Dana is smart enough not to cut one of his biggest draws in the U.K just because of a two fight losing streak, in which one was to the current champion. Did you hear the cheering for Hardy even after the KO? Dana was in the arena, I know he did. As for "just getting caught", when both you and your opponent land the exact same punch at the exact same time, that doesn't count as "just getting caught", that's called having more power than your opponent. If this counts as "just getting caught", then all should be said for all knockouts in the sport.
Vinicius Kappke De Queiroz - I have to wonder, did you even watch this fight? It wasn't that bad. You can look it up on the UFC official site. It's free.