Ships with forward hardpoints often turn off target even when winning, and slow turning turreted weapons lose lots of uptime when they switch targets.
The worst offenders (gauss, hellbore, HIL, tacyhon lance) can waste most of their potential damage output when lots of relatively fast targets are around the mounting ship.
Not strictly bugs, but I think these get in the way very often so would be worth another look.
Slow turning ship letting a beaten target get away(click for big version):
Dominator with a reckless officer has beaten a lone brilliant it had an eliminate order on, all it had to do is keep shooting.
Turned away at ~20% flux and let Brilliant vent instead, with burn drive available.
Loadout:
Worst offender is the Dominator (Onslaught can recharge TPCs when they are not shooting and Apogee does it less/has an L missile anyway).
If the base is hard to improve giving the hardpoints a slightly wider arc could help at least improve a bit, Dominator is decent but Onslaught is generally better so wouldn't be too much IMO.
Slow weapons looping between targetsEasiest to see on HIL/tach champion or gauss on atlas mk2.
One way to improve it could be giving higher priority to current targets for weapons with slow turnrates(or ships mounting them), so switching is less common.