I wonder if Pop is trying to get Wemby out of the perimeter to protect his handle? That might sound weird, because you have to dribble more to get to the basket. However, spacing is better the farther out you go and Wemby doesn't need many step (and thus dribbles) to get into the paint. So if Wemby can pull a center out to the three-point line and then get around him, it's probably one dribble until he's in scoring position. We saw someone like that against Chet in that sequence surrounding the still someone posted after the OKC game. Basically, Wemby took the board, brought the ball past half-court with Chet on him, and drove past Chet. OKC doubled (they didn't triple or quadruple him like some suggested). The normal way to respond to that would be to pass to Branham and start the wing to Barnes. However, with Wemby's height, he should have no problem throwing the skip pass directly to Barnes over the head of the defense. So in a better executed version of that, Barnes gets a wide-open three created by Wemby's penetration and OKC becomes that much more reluctant to send help.
If this is the plan, you can see why the Spurs have placed so much emphasis on trying to deter teams from cross-guarding. That plan to iso Wemby on the perimeter really doesn't work well against a forward who's competent at defense. But as mentioned a bunch recently, Sochan isn't going to force the switch. That's why I'm sort of wondering why the Spurs aren't trying to run 4/5 and 5/4 PnRs between Sochan and Wembanyama to encourage the opponent to switch back. If they go over the screen, you get the crack of daylight for a drive. If they go under, you can just rescreen or shoot. If they switch, then you have the matchup you want. If they pull a Brooks and just pull the screener out of the way to stay with their man, then you complain to the refs because that 's a foul.
My preferred adjustment is to not have Wemby on the ball and build around him being a screener. However, if you're going to both have Wemby on the perimeter and also play him at center, then you're going to have to be much more creative in how you help him get better touches more consistently. It's okay to try stuff and have that stuff fail. But you have to be willing to actual try those things.