I would fire the O-Coordinator first actually
Leave the defense for now
They seemed ok in Calgary(last 2 series) and to produce 3 straight turnovers in BC
Rather than fire anyone, let's start with looking at the problem of our offense. The play calling is too vanilla (predictable). Start by using crossing routes, play action, roll the quarterback out of the pocket, etc. Our offense is most effective when people are moving. Durant is not a pocket passer. Ever notice, most of his mistakes occur when he's in the pocket. Creativity will work; we have the playmakers to do the job.
The D has been doing it's job in the first half of games this year, creating turnovers and actually scoring points for us. If you take away the late "game is already over" penalty aided touchdown by the Leos and the bumbled punt that means BC scored 20 points on our defense. 20 points is more than enough to win games.
Remember, we have a d-line coach who has very little or no experience coaching at a high level! When you take into consideration he has never played or coached on defense it may explain some of the problems the d-line is having. Miller did hire the guy on Etcheverry’s recommendation however. I guess Etch has no one to blame but himself.