If you think the wraith is unbalanced I can't wait to hear what you think of the werewolf.
Chainguns have a high refire but that doesn't make them any better at killing fighters, I still miss NPCs with corsair turrets which fire alot slower then a chaingun.
If you want to kill a player fighter use missile turrets.
If the missile doesn't kill it then the fighter (as long as it's an original FL ship model) will still lose weapons, equipment or wings/fins.