Remnant boss ships sure do fit in to the lore and in the game's world, IMHO. I can see why the Domain's derelict AI are either inert or roaming and either way seem to have their brains cooked along with programming on the fritz due to being ancient without any energy shields and other missing elements.
However the Remnants have more intellect, energy shields, extra tech and can be hailed through comms (
sure the words they speak are a bit of a mess, but still that's something!) so my bet is also that they have their own capital ship or several roaming still somewhere because they feel a lot more organized to begin with. Not that much of a stretch for them to be the Cylons of this game in their own unique way.