I want to see this released, so the modders can expand on it....... it will make a great base for various city rebuilding mods, etc. Lots o' potential here.
The modders could also focus on expanding the adoption system. Currently, it so far appears that you can only adopt children of the human races, and the elves and beast races are still missing child races for them (which Bethesda will most likely never do, probably using the argument that it goes against the lore they've established).
I mentioned that last part because they have stated that elves may go centuries without having any new children being born assuming the population remains constant, leading to a possible rumor that elven children do not exist and that elves reproduce through a manner alien to the other races, and the Khajiit have been implied to lack real children as well. Their explanation for the lack of Argonian children is probably that they do not leave Black Marsh until they are advlts, and it may be possible that they have shorter childhoods, though they've also been implied to have a much longer life expectancy than humans, so it's not certain if the shorter childhood idea really fits in with that part of the lore, which has existed since at least Morrowind.
Still, there's really no actual lore reason as to why these races lack children other than the fact that Bethesda just doesn't want to spend the time to do them, probably because those races are not the focus of Skyrim (the Nords are front and center).