I'll add on.
I'm perfectly okay with Stefanski never getting involved on the defensive end, outside of a supervisory capacity.
If Joe Woods owns that side of the ball, and Stefanski allows his DC to actually own that side without having the head coach micromanage, I think I prefer that.
There are few things that destroy an organization faster than having confusing leadership from the top. When you're not sure if Woods is in charge or if Stefanski is in charge, it's demoralizing and splintering.
If a CEO needs to get involved in the support organization, they should instead just relieve the head of that department and appoint someone who can make leadership decisions so that the CEO doesn't have to get involved.
There's no reason for the CEO to be directly involved in personnel decisions, just like there's no reason for Stefanski to be micromanaging that side of the ball.
Stefanski SHOULD be evaluating and managing the DC and the defensive coaches though. If he believes that there are deficiencies there (which I think it likely) then he should replace those positions.
I think that trigger should have already been pulled. I'm okay with it being pulled in the offseason. If it doesn't get pulled, I'm going to be concerned.