I had fill empty lots off but then they gave us the new neighborhood stories and I erroneously thought it was a setting that meant move in/out of existing lots (which I thought would be fun and entertaining) and not fill all the empty houses that I had already toggled off.
What I'd like is to have is an alternative to all off or all lots get filled. BTW, Fill Empty Lots On/Off was very specific and clear what it's function was, the neighborhood stories Move IN/Out is not if you're looking to keep the randos from moving into all the good lots you're trying to save for later.