Abraham is nothing special but Froch is? I don't want to say that Froch could not fight his way out of a paper bag, but I'm not he could if it was a windy day and the bag was blowing around. Froch has trouble with movement. And he could not hit the broad side of a barn with the broader side of another barn. Dirrell was Froch's only win of the tournament. If you think otherwise you're seriously over-rating Dirrell at this state of his career.
He didn't because he didn't really believe he can escape or withstand the Froch's firepower. I think his sparring probably didn't prepare him for this fight, at least in his mind, which was why he was so hesitant. If I was his trainer for a rematch, I would have him work with MMA fighters, to get used to all the dirty boxing and throwing.
dirrell shouldn't of flopped. its a move that you europeans invented; soccer players. but unfortunately americans have copied some of your moves. he has to learn to just fight. thats it.