I've visited quite a few of them. They are 100% completely unchanged. There are no HABs added, no NPCs, no loot, nor any missions involving them. Their system of power gens and data storage is completely different than Odyssey settlements, and AFAIK, the Jameson crash site rendered them completely obsolete. Why was Odyssey not used as an opportunity to improve Horizons content? Why does every single update come out as detached as possible?