One super simple thing could even be to slow the boat down 2 mile an hour. He’s probably gonna complain that It feels too slow, but it will help him create rythem in the pass as everything is going to get a lot less rushed.
As it been said a few times in here, i would say the wakes are his biggest issue. Yes his position could de stronger but it’s definitely usable! In his kind of situation I like to get people to think about holding your speed through the wakes. The Slightly different wording gets people the stop worry about controlling everything and just making the goal to commit to speed through the wake. So instead of thinking pull hard through the wakes, think about speed into them and then the only goal is to hold that speed and position, we are not looking for ‘more’ through the wakes.
this video may be a little below his level but should give a sense of what I’m trying to say.