Let's use the collective basketball intelligence we possess to pick apart his shot. Specifically his free throw shot.
His form is good on his shot. I'd like to see him change the position of his support hand slightly. His hands are to close together.
I think if someone told him to aim for the front of the rim and shoot softer. He's missing them all long, and The ball is spinning wild and spinning sideways, and he flicks his wrist a little to hard.
He has tremendous power in his shot, you could see that in the three pointer he hit to close the quarter out. That shot was deep and really easy for him. A great sign.
I believe someone needs to remind him of his power, and tell him to take some off at the stripe. 64% is unacceptable. I want to see him at 80% in two years time. It's a big deal for him to get this corrected.