A couple of mods I'd like to see if For Rent doesn't do them.

First, I'd like to see lot traits--not just multi-unit toggles--that allow or disallow horses. Some lots are really not acceptable for horses, but if I turn off horse adoption in Neighborhood stories, that sticks to the family. A family living in a horse ranch that picks up and moves to a small house with no yard will still be able to collect horses unless I step in and say they can't. I'd much rather have a lot trait that disallows the adoption of horses in inappropriate lots, and prevents families with horses from moving into inappropriate lots.

The second, and the thing that For Rent might do, but probably won't, would be to allow changing existing apartments to multi-unit lots. There's a lot of apartments in San Myshuno that are far too big, IMO. When I'm remodeling them I always want to build a common area and then a bunch of separate apartments anyway, so it'd be nice to be able to do that for real.