Of course I trust that the DL knows what they're talking about, but I don't think there's anyway that we can instantly change the scheme to produce more sacks.
It appears that New England provided the formula to the rest of the league and that's to hurry up, snap the ball and make quick short passes. We need a totally different angle to beat teams that are doing this, and I think last week Rex made an effort. If blitzing and rushing defenders is useless when the ball gets out quick, then I think he was right to think that dropping into coverage would help. Unfortunately, the Bengals really beat us by running the ball late, and we had poor execution on 3rd downs (mostly unrelated to scheme in my opinion) which are whole different issues altogether.
I think people are a little overblown with ridiculing Rex and his scheme, and I think every time we face a bad QB we will destroy them. Time will tell, and I hope that they can make the necessary adjustments to get the DE's to the QB, but it does seem as though the defense needs to figure out how to beat the quick pass.