I think he has shown everywhere he has been that he can get deep positions in the post and bully guys. His technique, wide shoulders, low center of gravity and strong lower body allows him to do that. Even Jokic is surprisingly strong in the post and can get deep position and force his way against most starting centers. not to sound sound racist or anything lol, but White centers are built that way, compared to Black/African centers who has longer limbs, higher center of gravity and much skinnier legs.
Zizic will only continue to get stronger. His willingness and ability to finish on high efficiency and bang in the post is what are really counts. He plays big and is tough down there.
I also think that the more important thing is the ability to attack switches on very high efficiency. Teams wouldn't want to switch the Sexton and Cedi PnR with Ante because of his ability to score so efficiently in the post. That would open up the game for Sexton and Cedi as drivers, passers and shooters. I'm glad that he showed much better passing ability and instincts in the high posts and in the low post when doubled. He has improved as a decision maker and a passer which is great if we want to feature him a lot in the post as we should. That would make doubling him much less effective.
I don't see why he can't be one of the strongest centers in the league. He has a good base to build on and the mentality of a bully.