I'm in favor of k cost reductions because mk i turrets do their job very well already for the most part. the changes to the bonuses for flaks and lightnings would help as well.
[thinking outside of the box]
what if turrets can move, but cannot traverse wormholes.
Kind of like fort already can now? Why do I need to move sniper turrets at all? Well for some it might make sense; other not so much.
You wouldn't have to move sniper turrets, but only because it is infinite range and radar immune.
However, many of the complaints arise from turrets complete lack of mobility, regarding radar dampening, range, etc. The way to tackle them most directly is to have the turrets move, even if slightly slower the even plasma sieges.
It's partly why missile turrets are so loved. They are loved because they cover the most ground, so spend so much time shooting. And why flaks receive complaints that live up to their name.
If the shorter ranged turrets could move, radar dampening is less of an issue, and if they move slow, raiders and the like can easily bypass them anyway. Moving will allow turrets will, at least on the tactical level, let them do as fleetships do and give the max dps for most situations.
It would take some fiddling, because you'd have to tell the turrets where to "stand-by", and said order would probably be lost if destroyed...yeah, that does sound complicated.