Keep in mind guys that GSP did have a pretty nasty eye injury sustained in round 2 and he was fighting the rest of the way only seeing out of one eye. I would imagine that isn't the easiest thing in the world.
GSP knows exactly what he needs to do to win fights, period. He doesn't take a lot of chances and does exactly what he needs to do to keep his belt. There isn't a smarter fighter in the UFC.
Daniel - You act like GSP isn't facing fierce competition. He is facing fighters every bit as good as Sonnen or Marquart.. and beating them easily.
The latest developments for GSP that I've heard are Nick Diaz coming over from Strikeforce. I don't think it's up to GSP to move weight classes to secure new fights.. it's up to the UFC to bring in promising talent to challenge him.
I have no interest at all in GSP/Silva. Silva is WAY too big for him. Silva walks around at 220 pounds, for goodness sake. If anything, Silva should be making a move to LHW and fighting Bones Jones... now THAT I'd love to see.