Updating packs? Can you add lots too?

Strangerville and Forgotten Hollow definitely need more lots, Glimmerbrook could use an entire rework and also more lots, and we could use an overhaul of City Living, allowing multiple households on the same lot (like Sims 2), and allowing us to completely change the layout of San Myshuno apartments.

Also, the alien party lot from Get To Work, it would be great if it used the Community Space/Auditorium feature, with different lot states saved on a single lot; that way, we would be able to edit it without it getting overwritten.