Imperial Aces gives you two title cards, the TIE/x7 and the TIE/D which make the Defender not only a valuable asset but one that is going to be hard not to choose.
Say hello to the TIE/D, two attacks per round. Smack them with a Flechette Cannon, Ion Cannon or Tractor Beam...it really doesn't matter...you are still forcing them to choose when to burn their Evades or Focus. The Twin Ion Engine Mk. II mod and Push the Limit are still excellent choices for this title card.
Cardboard Dungeon does a great review of the entire box set...as if you needed more reason to buy the Imperial Veterans Expansion Pack!