He can continue to do the things he does, and he needs to mix it in with other stuff in order to have go to moves and be an elite player. If he doesn't plan on being one of the best players in NBA history then he can continue doing what he's doing, but eventually he has to evolve and develop more moves and be able to create more offense for himself when the defenses get tight and focus on him and denying him the ball.
I am not saying he's going to turn into a purely low post player and to forget everything else, but he needs to have much more low post moves and post ups in his arsenal. Even the midrange game ala Duncan he needs to use more of that in games I feel.
This kind of development is much needed for his offensive progression, turning him into an elite offensive weapon that can play in the half court without relying only on lobs and dribble drives and threes.