He needs to change his game up. His striking and jiu-jitsu are both extremely solid but his overall defense is horrible, especially when it comes to kicks and wrestling. That stance he uses pretty much just asks for his opponents to whack the shit out of his lead leg and he keeps his hands too low. Also, the taunting needs to stop. It's not "cool" or "badass" it's stupid and hopefully he'll learn to control himself while he's in the cage, as he's gotten his ass kicked twice now.
Ideally I'd like to see him stay at 155, start lifting weights, work on his wrestling and change his stance and get with some guys to improve his striking defense. But we all know that Nate won't leave that shit-pit called the Scrap Pack.