Under pressure, Book picks up his dribble way too early, and our team never seems to have worked on proper actions to punish double teams like Ant repeatedly showed in our series.
Shooting 3s: he should practise a lot making them with a hand over his face, the way Doncic shows us in warm-ups. All our big-3 plus Allen should do that. In PO games, defense is a lot tougher to allow much wide open shots one gets in regular season games.
More and better driving layups vs. mid-range jumpers: Book showed it in the last game, but too late and too little.
Defense: He should be mentally willing to work on and play defense, consistently not just opportunically and then by committing quick fouls.