I played a game last night an used the fighter packs for the first time. So, I had one I each rebel squadron, and I have to say, I was not impressed with the b-wing. The lack of heavy and being speed 2 meant that the b-wings got caught by an interceptor squadron and tie fighter squadron and was obliterated in short order.
I think x-wings and y-wings are the way to go. Y-wings will be able to keep moving to the target while the x-wings (and maybe an a-wing squadron or two) can tangle with enemy fighters.
It seems that with b-wings you need to play the waiting game until your fleet engages at close range, and then pray that you have been able to wipe out the enemy squadrons before they manage to keep your b-wings from using their torpedoes.
Has anyone found success with b-wings? How ddid you achieve that success?