I would have to re-watch the State game (something I am loathe to do), but I got the sense that we more actively funneled players away from ball screens in that one. I think that's the right thought, as our bigs have not shown the ability to handle guards on high ball hedges or switches. The problem in the State game appeared to be that the big didn't seem to play along. Well, this was true at least in several instances when said big was Wendell Carter.
My sense is that a lot of this stems from Carter not knowing what he is doing defensively. When he's near the basket, he's fairly effective at rebounding and blocking shots. But he just doesn't seem at all facile when it comes to high ball screens. And that's understandable for a frosh. My guess is that this is because he wasn't really asked to defend too far from the rim in high school. That, and he was so dominant on the other end that it didn't matter if he occasionally gave up open looks to less talented players on the perimeter. But now that the quality of competition is much higher on both ends of the floor, not to mention that teams are much better at scouting and identifying opponents' weaknesses, his lack of awareness is getting exploited.
I get the sense that having Carter drop down will help him and at least mitigate the damage. It will allow him to play where he is most comfortable (near the basket). It's not ideal (for the reasons Troublemaker has laid out), but I think it's better than seeing our defense get spread out more.
And I don't mean to single out Carter, as he's not alone. Our rotations aside from the big involved in the screen have also not been great. Seems like guys are often too eager to help or don't help at all. That just compounds the problem of struggling with the ball screen. At least dropping down on the screen will allow others to stay home more often. I like the idea of pull-up jumpers a lot more than I like giving up layups or uncontested corner 3s.