I don't know anything about this stuff, but from what I can see, it looks like he's putting his weight forward and into where he is receiving the push, and applying pressure on a vector from his back leg to his shoulder. What I would do, I think. I'm missing some things here for sure about what 'iis or is not happening, and what should be happening." That's what it looks like to me.
So, is that what you are referring to? At both points, you can see where the stance firms, where it looks like his own energy moment of mass moves slightly forward.
Yes, that is what I am referring to. Now if that is the case, is he increasing pressure on his foot or not if he goes forward when he lifts his front foot? Would his rear foot remain heavy or go light? Is he under the pusher or not?
I will also put up a drawing in a bit with regards to the front and rear foot.
Note we still haven't even touched the knee up knee down portion.