PK ran a ton of single high at UW. I've been waiting for us to install it. When we hired him I actually thought that BJ Foster was going to kill it as the box safety (oof). I think he's just been limited by having so little reliable athleticism at DB so far.
I'm hoping that the combination of corners who can be trusted more than 15 yards downfield and Derek Williams lets the defense evolve in similar way to the offense last year; that is, the coordinator can finally run their full playbook.
Side note: I see people talking about Wisner being a good fit for the "Keilan role." The Keilan role isn't really a unique position. Sark is going to use a variety of motion and screen concepts for lots of his skill players. It was only limited to Keilan the first two years because X was our only good receiver, so he needed to be running down the field, and it was more important to use Bijan/Rojo as traditional RBs. Once we added Mitchell last year, X was able to eat up Keilan's snaps. Next year I'd expect Bond, Blue, Wingo and others to all be able to fill that. I hope Wisner gets some PT, but it won't because he's put into a special Keilan role position.