As per my idea, I was thinking of temporary siege platforms. Much like EvE's specialist POS destroyers have a siege mode that boosts fire rate and damage at the cost of being unable to escape. That wouldn't work in disco since you retain your ship after death, also it's damned boring to boot.
So we use what we've got, a carrier without a purpose and a system of base defenses. Put them together and we get an interesting bit of kit, limit the time of the turrets, make them destructible (of course) and add a commodity requirement (munitions?). If someone DC's, I don't know give them a minute grace period before they self destruct?
Just throwin' ideas out there.