I've imagined this as something like the Dyson Sphere but with high-tech AI shipyards and research stations inside. And this "Dyson Sphere" is the mothership, so I think his mothership is something like system itself, like system inside other system. Eg. Nomad Lair in FLU. Dunno, if I understood it correctly, but I think I've got it
Idea is interesting but it won't fix into lore and etc. It should more easily fix into Nomads but well, still won't.
I guess you meant something like hive
About new ships for AI:
They've got good and strong ships, both their cruiser and drone is good. And can be very deadly if they're used properly. Anyway I'm for adding something for AI. Maybe small reckon vessel with better cruise engines and scanner - just idea. Or light fighter with cloak, which will be able to cloak for a short time and then will need to regenerate itself. The cloak which won't consume batteries but will need to load after using (eg. for 3 minutes or more)