Kessler made so many mistakes in the first fight, he abandoned trying to outbox joe (which was competitive in the early going) and listened to his dumbass corner who kept saying "you got to take the fight to him" through out the fight. But either way, I still cant see what Kessler can do to make him have a decisive edge over Joe.
You have to consider that Kessler had a hand injury shortly before the fight but still fought. The fight was close so assuming he doesn't have that injury the second time around he should win. If this second fight takes place at a neutral venue Kessler should win quite comfortably.