I don't think he's a particularly special coach.
But there's no scheme that will compensate for our DL. I'm amazed at how much people believe that coaches can do magical things with "scheme" that will somehow erase huge talent differences.
Sure, you can do things to protect your sub-par RT against Joey Bosa, but doing those things has consequences: you limit your options and flexibility because you're keeping a TE in to block or you're getting the ball out quicker. You can disguise coverages all you like, but if you can't get any pass pressure, guys are going to get open. You can get blitz-happy but that's a high-risk strategy, especially if you don't have the DBs to hold up on the back end.