What was the reason for these particular drills? What were you working on trying to correct?
I don’t particularly care for the first 2 drills but that’s just me. The third I could see some use.
What I see that should be addressed is again - his arm action. Overall he is much improved, but his hand break needs work and he is dragging his arm through the high zone (which is what you are noticing and concerned about - rightly so).
So the drills you are doing should be put aside for now and direct work on hand break and arm action through release should be the focus IMO.
Here is what I see:
I pause the above video at the point where he is putting is arm behind his body and it’s getting trapped there. This is throwing off his timing throughout the rest of his delivery.
In the above clip you can see his arm is late (paused at footplant) and he is dragging it through the high zone and through release. He tried to compensate for this with a little “hip slide” as he plants to “buy some time” for his arm to catch up.
So I would have him focus and breaking his hands first. Try breaking the hands with a flatter W (hands going out more than down). This may fix everything else. If at scap load his arm is stll late, then you will need to focus on that part of the delivery too.
He looks like an athletic kid with a lot of potential.