I know he can score. The thing that's standing between him and an NBA rotation is his ability to effectively create for others, particularly in the pick and roll.
Right now, he's the easiest type of player to defend. That's cool sometimes, but since I don't care about Summer League and I'm interested in it for what it represents at an actual NBA level, I want to see what he can do.
If you can't try and fail at Summer League, when can you?