Why wait until 4th down? I say when you win the coin toss, take the ball, fair catch the kickoff, and punt on 1st down. Send a message to the other team that, "you can't stop our punter, you can only hope to contain him."
Seriously, was it too hard to say that you trusted Dixon to drop it inside the 10 and your defense to get a quick stop and chose to play field position?