Well … it was also Woody's first year and his D was actually very complicated. We didn't blitz as much because he didn't have the players he wanted - everyone anticipated that - and because the D took all season and then some to put in. I had great hope going forward for his Ds; we vastly improved our rate of turnovers in a single year and, with more experience, we should have been much better.
Oth, I wouldn't put it beyond Paul to intervene on D; people forget that he started out as a DC and knows a lot about that side of the ball. Also, we know that he intervened in Roof's last year when he saw some things he didn't like. Problem = he intervened to tighten up the pass coverage and get more aggressive play. So … the one instance where we know for a fact that Paul did intervene, he did it to increase the aggressiveness of the D. This isn't congruent with part of the thread.
I do know that Coach is virtually guaranteed to intervene on D. Indeed, he has a rep for being like Saban on that; i.e. there isn't a real DC at Bammer, just as chief assistant D coach for Saban. Personally, I have no problem with that. I've always felt that all the "head coaches should be CEOs" stuff is directly contradicted by experience. I'm looking for us to get better on D directly, then suffer a reverse or two in 2020. But that'll be because of the schedule, not Coach.