I think this game needs a feature where people can save and upload their builds to easily populate other peoples servers and single player games. Single player map with builds guarded by thralls, with loot to be found when you break in would be so amazing, given the building talent of the community.
Also some branch of ‘The purge’ that activates when you start raiding one of these player builds you downloaded into your world, that counter-raids or attempts to defend against your raid would be amazing.
Much like the Sims build sharing option, you would have to factor in dlc, build size and build location. Is a potential build import site already in use? Will the import build have enough clearance to fit in a different location? Whilst good in theory, it may be difficult to implement.