Great rhythm, like the Sam Snead shoes! Watch the spine angle @ release interval...comes up and out a bit. I would suggest Brian's video on the Snead squat, it would help his lower body action.
1: More bend from the hips and extend the arms a bit.
2: Setup is causing the shoulder turn to be a bit flat -club has to swing in a flat arc.
3: This is probably caused by his insistance to play men's length clubs his entire life. Currently he is 5'4" tall. He may not be able to fix 1 and 2 until he grows taller. No matter since it will force him to continue to improve his short game.