I hope Young is working and on the things you listed, rollie.
He said he models his game after TMac. If he wants to be a TMac kind of SG, he needs to show significant improvement in his handles, as well as his midrange game.
I hoped he would go in another direction - the "Ray Allen school" of off-ball movement SGs. His game needs less changes to do that. Alas, I've rarely seen him move without the ball. It is always running to the right corner, soft cross to the left, go back on D.
Off-topic, but if an offer for Young comes at the draft day, I am trading him straight away. There are at least 15 players in this draft I'd much rather have on the team.