The key to a 3-4 is a big athletic outside LB, a beast fat nose tackle, a couple 300 pound DEs, and middle linebackers who love to smash people's faces in. This defense really sucks if you dont have the personel for it. Jauron runs a cover 2 to compensate for some weak players at key positions. The cover 2 right now is probably the most logical choice for a defense on this team.