I'm still a bit shocked Rex got the head coaching job in Buffalo. He must be licking his chops over that defense he's inherited. Assuming free agency doesn't destroy it.
I think Rex could be good if he does the Tony Dungy Colts thing and gets himself an great offensive mind to handle the offense and pick his QBs and Rex concentrates on the defensive side of the ball and the major decisions. Rex needs to leave the offense in some other hands.