There's a mod called Star Lords that adds something like that.
I've seen it, but it doesn't really do the whole 'symmetry' thing, IIRC. It just adds a bunch of respawning fleets that fight it out in the core worlds.
I was thinking about trade caravans that persist and have a fixed money supply, pirates that go around stealing ships and using them, and so on.
I just realized there's space for a new mod:
Saarsector. Similar to early mods which added factions based on America, Russia, China, and the EU, Saarsector would add a faction based on india.
Ships would be painted in the national colors, with noticeable brown stains. All ships would have a system similar to the Orion Drive, which leaves a toxic brown cloud in the ship's wake as it propels itself forward, with an appropriately wet sound effect upon activation.
Officers recruited from the new faction would lie on their resumes, claiming to be level 7 with 6 elite skill certifications. They would all be set to timid personalities, and would have no skills by default, but would only cost 80 percent of a standard officer's salary, and would provide benefits allocated to standard officered ships. A random event in which female crew file sexual harassment complaints and receive credits from the player's account would occur when one of them is assigned to a ship.
Patrols would randomly approach the player and request Apple gift cards. Upon being denied, they would curse the player out in hindi.