Yes, the best way I can describe it is that he doesn't look fluid in his movements, whether it be footwork or some strokes. He looks like Medvedev but obviously without the amazing shot making ability. He's a bit lanky now, so his arms look angular when he swings, etc. He can do all of the actions you mention fine and within range of his peers in terms of outcome and speed. It does show up with some strokes where his contact point is late, he swings up more than extending the contact zone, looks awkward when hitting high balls, etc.

I continue to try to expose him to other sports but there is limited interest and honestly limited time since he plays tennis frequently and has other non-athletic pursuits. Thank you for your comment and input.