I'm going to try to talk my wife into letting me buy this. Conceptually I agree with you; being able to pin someone to the surrounding landscape is a valuable tool for a grappler in both self-defense, mma, and beyond. It's why I think the chinese wrestling arts, and sumo, both heavily stress the "ring out" or locational loss, because of how valuable it is to keep track of your surroundings and not get pinned to a wall and ganked.
Also I think I still have some of your vids on darce chokes / rolling back attacks on an old external hard drive, they were my jam.