It would be a good experiment for them if they're open to making instanced housing with outdoor areas. Enter the house and you're in your personal instanced version with wall patio in back for outdoor furnishings. Exit and you're placed right back in the Enclave with other players. The only issue would be how to allow other players to visit without having to scroll through a massive directory to find a friend's specific instance (have the directory only show players on your friends list that set up their house perhaps?).