The NBA is a talent driven league. If he could play and be productive he would be doing that already. He can't create, he needs help from other teammates to get open and he can't defend. He also can't shoot it out of a phone booth as many spot up shooters do. He relies on rhythm to move into his shot. He is limited and that is being born out by how much he plays. He will be out of the league within a year or two.
Great college player. Great memories of him at BYU. Nothing wrong with that.