They did some disguising, but nothing too crazy. Whatever they showed pre-snap turned into cover 3 60 percent of the time. Arch was just phased by the environment and wasn't trusting his line or his process. The other problem is Sark was too predictable early and really didnt fully adjust to the cover 3 until the 2nd half. He needs to switch up what he comes in with to start games. Good defenses have him scouted and bagged.
If you want to see something he could do, watch the film breakdowns of FSU. They used the threat of Castellanos running along with jet action or some type of horizontal threat to keep Alabama's LBs guessing. That's the shit we need to see incorporated into what Sark already wants to do.
Now, if you want to feel better about what we have, that film of the Alabam defense will do it. Whatever was coached into them by Saban is gone in 18 months time. Poor gap responsibility, LBs and DBs guessing, not setting the boundary to force the ball into help. You name it, they fucked it up that game. I don't know who DeBoer brought as his DC, but if this keeps up he better fire that mofo and go get some old Saban dudes back or he's going to be cooked.