Those are some nice looking versions of Newcrest. I'll have to see if I can screenshot mine when I get a chance. My Newcrest only has two residential lots. Most of what is there are downloads from the Maxis packs or some community builds mostly from the gallery. Anyway, my Newcrest is full but it's where I put community lots as a separate hang out area within my main save.
If I were to really play with Newcrest residentially, it would be a new save. It's great having a place for various lots such as spas, a movie theatre (that I customized in building it), a different style of library, a cafe, several parks, a small graveyard, some restaurants, lounges and a nightclub that I admittedly don't use that much.
As I mentioned, it is full and lot space is a bit tight for me lately. I wouldn't mind another empty world like Newcrest even if it is more of a small-to-medium-sized world.