Yet, Vet players like Matthews, Daniels, Perry, Dix, Burnett, House, et al aren't playing well under it either.
While I get what you are saying, in the notion that it takes 11 players, all on the same page for the execution of a complicated defensive scheme to be successful, which it hasn't been over the last 6+ years. I also firmly believe offensive coordinators are so familiar with Capers and how to attack his defenses, that it even with flawless execution by all 11 players, offenses are going to be successful.