Actually it will and has been working. If the refs didn't steal this game then it would have worked again. Fact of the matter is the defense shut down one of the best offenses in the league and the refs stole the game. Defense and goal tending can take get you a cup.
And what will be the backup plan if we can't contain a teams offense? The offense can't finish, and the PP has had issues for years now. As others have said our margin for error is small now because we can't backup out defense with a potent offense.