What about this idea that someone had back then? About cloaks?
A cloak that instead of making the ship invisible would make it untargetable and vanish from the target list (but still leave it visible to the eye).
From what I remember. it would...
deactivate shields
deactivate weapons
deactivate thrusters
deactivate cruiser engines
cost no fuel to run (cost is all the energs from shields/weapons/cruise engines/thrusters) - it would still need some time to prepare though, maybe 15 to 20 seconds?
My memory is kinda vague on it but that would make nebulas and asteroid fields useful. Of course this idea would be for snub craft. Such a thing on a capital ship would be of questionable use I would guess.
Also, whoever remembers the original thread or person who had this idea to begin with, feel free to post a link, I don't have time and couldn't find it on a quick search. But I found the idea promising.