It was just so that he didn't fall down too quickly. I didn't move him to assist with my attacks.
It was made for the build-up replay comp, where you can't touch Uke in the first 300 frames, and in sambo grav, Uke would fall over too quickly. The rules state that you can move Uke only to keep him upright.
But that's besides the point, which one do you like better and why?