Will the hiring of Rex Ryan improve the Dallas Cowboys defense?

It's official. Rex Ryan, nephew of famed former Eagles coach Buddy Ryan, is now the new Defensive Coordinator of the Dallas Cowboys. Ryan has a reputation around the league of stirring the pot, but has been successful with the New York Jets, guiding them to two straight AFC East titles, two conference finals, and a Super Bowl berth against the Indianapolis Colts three years ago. Though Ryan comes across as cocky, and controversial, players and other coaches in the NFL say he is a brilliant defensive mind. With the Dallas Cowboys defense having struggled for so long, is Rex Ryan the right man to steer them in the right direction?