He's part of the problem, not the solution.
He generally tackles well and people mistake that for good play.
I see him screw up quite often in his assignments. If we're lucky, usually Lee bails him out or the opposing team doesn't see it. If we're not, he kills us.
It's been a couple of weeks since I watched All-22. But, I saw a few plays against the Vikings where I'm pretty much 100% positive that he was supposed to take a player. He would then get fooled and go the wrong direction. Lee would kinda drift off towards Church's responsibility, kinda waiting for Church to pick his guy up. Ponder just couldn't find him because he sucks as well.
To me, this defense is probably Free Safety friendly, but it really needs a SS to make it work. It asks a lot from the Strong Safety because they have to play in the box and deep. They have to help out in deep coverage along with play some man-to-man, even against WR's. That's why this defense worked for years, it had John Lynch. Fortunately, Kiffin was pretty good at finding safeties that fit his system when Lynch left. But, it was never quite the same. Still very good, but not dominating like it was around 2002.
Skill wise I don't think he's a major issue. He doesn't have great cover skills, but he has range which is most important in zone coverage and he tackles well which is also crucial in zone coverage. He just incorporates bad technique because he gets fooled quite often. I think that's why they stick with Church, thinking that he will eventually get it. I have my doubts. In many ways, his not knowing where to go is very Tony Dixon-ish.
YR