I am hoping that Smart reaches one of these best case scenarios and becomes a 2-way force. One thing we can notice, that isn't in his favor, is his physical playstyle. All those strong 2-handed takeaways, ball slaps, the floor dives, crashing the offensive glass "on his head" and the extra muscle he carries (and uses). These are all stuff that take away your touch but help your hustle. You can't have both (at least MS can't, Kawhi, MJ and rare HOF guys can), to be a maul and to be a finesse feather at once.
But he is a mini Ron Artest (I always viewed him in that light), a guy that can lock down the opponents main threat, and still hit a dagger three to secure the championship. Even if he is 0/4 till that point.