I'd say it's part of his development. Let em shoot. He's already an effective rebounder, shot blocker, and assist guy-- the last part of him becoming an all round threat is the development of his jump shot.
George Hill's shooting in his first Summer League was so bad that Pop wondered if they'd made a mistake picking him, and that was at age 22 after four years of college. A decade later, he led the entire NBA in 3pt%. Pokusevski is playing in the NBA at age 19, after one season as the youngest player on a second tier Euro team.