Thank you for your support and suggestions.
About NPC families - not sure about this realization, but i'll think about it, why not.
About outposts. I intend to add "carrying" later, so players must have friends or wagon to transfer enough resources for building or gather it around construction site.
About NPC traders. I plan to give them a minor role - simple local trade, but player's trading with caravans between towns is one of main economic role. And NPC robbers/guards (as attacking/defending players) as a consequence of intercity trading.
By the way, perhaps you might be also interested in "Kingdoms" (rich NPC system) and "Realm of Rulers" (NPC villagers).