This post hits it on the head. He is a very go 3pt shooter. It’s just that he doesn’t take the high % 3s, which is for him, the catch and shoot. I think most of this comes from not having another player the other team fears. So Trae is stuck with making his own shot. You rarely see the defense leave him in order to get a catch and shoot / pass from a team mate.
I think when John comes back it will help Trae’s shooting. Once his other 2 draft class members get comfortable in the game Trae is going to be deadly. They all are capable of shooting high percentage three-point shots.