He needs to spend a little more time polishing his stand-up and less time on wrestling and submissions.
Dudes here trying to chime in by typing before thinking.
Since when the hell did you start watching MMA?
GSPs base is striking and was fighting mostly as a striker at the beginning of his career. His wrestling got better and better (imo) during his fights w/ Hughes. Hughes back then was destroying everyone through his wrestling + gnp/subs, and I bet GSP realized how important that is to neutralize that and finally beat him. When you have Sherk, Hughes, Koscheck and Fitch to face in the ocatagon, you better know how to wrestle, then execute a sub or gnp to win the match.
Now he's just a stud and realizes how it gives him a competitive advantage against people like: Serra (pulls guard way too quickly), Alves and now Hardy hasn't really shown a lot of wrestling skill and GSPs able to take advantage of that. He successfully out wrestled BJ twice and gave him a combination of stand-up + gnp to win those matches.
Call me anything you want, but you're dead wrong about that "GSP has to polish his stand up" non-sense
. What he doesn't have is the KO power, and I'll take that one whole-heartedly.
PS
Mir's on suicide watch right now.