I've been playing on my RM recently, and I've noticed that fighting LN npcs are absolutely ridiculous thanks to there rear turrets.
Try fighting a wing of 3-4 flying in formation, staying behind them and its like having a LF flying backwards constantly shooting you with supper accuracy since you can't dodge behind them if you want to do any damage. I don't even want to think about what Outcast NPCs must be like.
(Note: This only seems to effect turrets that are placed horizontally, since the vertically placed ones have trouble firing even for NPCs.)
Dropping they to class 4 won't be to bad, they will still have just about full forward damage, but this is simply wrong for them to be able to do a tone of damage to you when you are on their tail where you should be safe.