Just had a random idea for an ability for the Defender:
-When defending, reduce the opponent's attack value by 1 (to a minimum of two)
Assuming a more reasonable stat line like 3/3/3/2 or whatever, this would give the Defender a means to be more survivable without pushing it out to 4 agility or otherwise hosing the 2-attack ships' chances of ever hitting it. 3 agility and 5-6 HP makes it about as survivable as a TIE advanced, which is decent but for such a potentially expensive ship it might not be enough. It also gives the Empire something besides swarm formations to take on rebel 3-attack turrets or powerful weapons like missiles and heavy laser cannons in general, to further make it worth its points.
How to implement this: as a single pilot's ability? As a modification/title? As a general ability for the Defender via a new rules insert? I do not know, but it is an idea.