At least Alves has made himself into an exciting contender with wins over Karo, Hughes and Koscheck. I don't remember his loss against Fitch but I remember his loss against Fisher - he's twice as thick now. I'm confident that he'll match the level of steriods in GSP's veins should they square off. GSP couldn't survive some of the shots that Koscheck handled so as long as Alves isn't taken down at will, I think he stops GSP.
Silva has to be faulted in that main event - really didn't throw that many punches or kicks. 5 rounds of that would have been even worse if things never opened up.