Love the idea of organizations or a civilization co-locating land structures together. There may need to be in-game benefits applied in a subtle way to incentive congregating. I think the best example I've seen has been a ship showroom. Another could be XX amount of building mass is required to institute a political system to govern the region/planet. Issue would of course be if it was located on a planet and not a moon then the factor of PVP is an issue and some d-bag org can flip the place upside down (grieve). However, that threat may actually add interest in the game, and we could start to see something like nations fighting each other in the atmosphere. I REALLY think some facet of this should be explored for development.