Huh.
That's....not how I've seen it described in the past.
I've seen it drawn up almost as a close cousin to a packline, where the backside of the defense sags way down almost into like a zone look to help prevent the dribble drive. The other thing I've seen multiple times is the idea that the guard is going to ice the F out of the screen, which puts the impetus on the big to be able to handle the guard coming downhill at him and use the baseline as a help defender.
Is that just wrong? I know you coach, so I'm not saying you're wrong, but I've seen it drawn up that way a couple times, and I'm curious.