I was just thinking this myself. It's like he's suddenly became some kind of one dimensional fighter and lets face it, it isn't exactly getting him in the win column. Like you i couldn't beleive it when he used his BJJ skills to stand up! There is only so much longer that the UFC can call him the best BJJ guy in the UFC, as he isn't showing it.
I have no doubt that Bisping would have finished Maia if that fight was still on the card.