I could tell you much about this player but I wont , you should hear what those that know him well say but this guy has the talent no doubt !
#1 I know 2 coaches who had top 10 players. It's critical to develop the right playing style. I doesn't look like you have counter puncher or grinder. The best you can hope for is massive serve, massive forehand player- like Querry or Blake. Blake had the big forehand at an early age. Good I think that you are keeping him away from the USTA where it is one style fits all. However the development needed on serve and forehand is a huge mountain at this point.