FWIW, the rumor is that on his previous teams the locker room soured on him a bit, kinda in the vein of Randy Moss / Brandon Marshall. Which is something to consider moving into the future, I guess, but given his talent I'm all for giving him a chance. Maybe he just needed to be in the right situation, maybe winning cures everything, maybe Belichick gets sick of him and jettisons him after getting a couple years of production. I'm fine with any of those outcomes.
Also, I'm hesitant to hold it against anyone if they get fed up with a locker room that's led by Cutler and Marshall.