Its the players. Stop going bargain basement for DT. Stop minimizing the importance of this position. Stuffing the run and pushing the pocket back into quarterbacks face is vital. Nobody is coaching the linebackers. I even see Sean Lee taking missteps, getting caught in the wash. So its not just LV and JS. Its also the scheme of the last and current regime. Reactionary defense doesn't work. They are not adapting to new NFL. You have to run blitz on every down, on the way to the quarterbacks. You also need hard-nosed cornerbacks, willing to tackle and jam receivers, at the line of scrimmage.