Peter DID only get the shapeshifting power. That's what he means when he says "You didn't expect I'd take that one" cause the most obvious choice would be to take the ability to absorb new abilities.. remember Sylar can kill to take powers and do it by empathy.. he just doesn't do the latter cause its not him
I can't believe its Tracy Strauss. Tbh I thought it would be the third sister, Barbara ;o
As for Zachary Quinto's status on the show, I think Nathan will be killed off half way and Zachary will return to play Sylar