I think it's a nerve-muscle phenomenon, his new mechanism is far better than his old but it takes time for the nerve to form to perform the action, so you will see 6-7 bad shooting games and 1-2good, with time goes on the more he shoot the more thick the nerve path formed and it will be 2good 2 normal 2 bad and on, it's likely 2-3 years to reach a relatively reliable shooting for him
With that said Danny made the right decision to not extend him preseason