He's an elite LB? The best thing he brings to the table as a LB is his pass rushing ability. Cowboys don't even drop him into coverage anymore on 2nd and 3rd long. He's not reading keys every down. He doesn't make any formational adjustments for the Cowboys.
He's certainly having a dominant season but to say he's an elite LB is an overstatement because he's not being asked to do traditional LB responsibilities. He's a ball player. He sees ball and go gets it, and excels in doing so.
Credit to the Cowboys coaching staff for putting him in a position to be successful.