2020DAD - thumbs up! I think "measurables" sometimes get confused with stats in some peoples' minds. The occurrence of an error is one stat that helps demonstrate this. My 2017 got credited with an error in the OF the other day. He is pretty good at reading balls and is pretty fleet of foot and was able to catch up to the ball and simply dropped in full stride. Not arguing the error itself, but if he were playing MLB, you could now track reaction time and foot speed, distance covered and maybe a few more items and get some idea of how he actually performs relative to others. To bring this back to the OP, I don't understand how a few "live" action plays, seen live with no replay or secondary angle, provides a superior set of information with which to construct a development plan as opposed to some game video alongside some solid measurables. If the kid is slow, measurables will show this and indicate he needs to work on speed. If exit velocity is weak, measurables will show this and indicate he needs to work on his hitting. Spray charts can help demonstrate hitting tendencies. The list goes on and on. Don't get me started with TrackMan and spin rates (which I would love to learn more about).