So, Derelict motherships. I love their design, but actually fighting them (and their defense fleet) in their current iteration feels a bit underwhelming. This probably isn't a place to post this feedback, but it kind of fits!
Although fighting one was fun, it was kind of easy to defeat the mothership and all of its defense drones with a fleet of 8 ships ((3 carriers [mora, heron, condor], 2 destroyers [hammerhead, sunder], 3 frigates [lasher, brawler, monitor].
Though while I was fighting it, I just assumed it was thematic that it was really easy, considering how old and battered all of that technology is. However, I did have a voidcraft-heavy fleet ((those Khopesh Rocket Bombers seem to be the bane of their existence)) so maybe they need more anti-fighter anti-missile support drones mixed in there? In particular, those destroyer-sized drones with like 6 or 8 machine gun turrets and active decoy flares did not seem to be very helpful for the enemy. They were usually not in a position that would give support to their more vulnerable allies and even then those drones couldn't defend themselves against 2 squadrons of Khopesh Rocket Bombers. One or two attack runs was all that was needed.
It sure is satisfying when those things land rockets, though. Much more satisfying than Piranhas.
Oh, and the drones all scattered far away from the Mothership, outside of its firing range. What's more, it seemed completely defenseless against voidcraft as well!