He hits very "oldschool", preferring a closed stanced almost eastern grip, with it's slower swing, than what has been preferred the last 15 years.
The more modern SW or W grips give him a chance to swing harder on every ball, so he chokes less, so the ball jumps higher, and he becomes more consistent IF he can swing faster on every ball.
I suspect he's going to have trouble handling the higher balls as soon as higher level highschool play starts. He'll constantly get deep balls bouncing higher than his strikezone, which seems to top out around mid chest levels.
And younger players aren't always the best at metering out energy. Better he play with more extreme grips so he can hit out fully hard, and the ball arcs into the court.