Sampson shoots the ball in the same manner!
Not a shooting guru but think Sampson's problem is a little different...He shoots the ball from too low a starting position which I believe limits his range...the ball rotation looks good unlike Pointer's shots which rotate sideways...
Sanchez is another one, line drive trajectory that I think is a product of him releasing his shot on the way down...Obekpa falling away...
Again, not an expert, just my observations...things that I would think would be worked on...maybe they are but no evidence
All of your observations are dead on!