In 2009, it felt like every defensive play was going to be a blitz for the New York Jets. As Mike Pettine gained more control over the defense, the team started dropping back into coverage more, playing into their strengths with elite cornerbacks. Now, the team will swing towards the other direction, with (presumably) better interior pass rushers than cornerbacks with the loss of Darrelle Revis (although I'm sure Antonio Cromartie, Kyle Wilson, and Dee Milliner would disagree).
This pendulum-like swing will return the team to its blitz-happy days and will make the team far more aggressive. As Rex Ryan said at the end of this past season, he wants the team to become more aggressive on offense, which would suit the similar attack-style feel the defense will have.
In my mind, this is the way a team should be set up. It should attack the enemy from all sides, offense, defense, and special teams. It should force the enemy to play on your own terms, not theirs. It should find the weakness of the other team and exploit that. I, for one, welcome a return to an attack-style defense. I just hope the offense is able to keep up.