There has been some hand-wringing about how the poor A-Wing is under-powered. However, there is one crucial reason why the A-Wing still has the potential to be as awesome as it ought to be: Counter is great against weenies. The Imperials are much more likely to field weenies (TIE Fighters, TIE Bombers), and so the A-Wing is more likely to benefit from this strength vs. weenies than the TIE Interceptor is.
Let's create a thought experiment. 12 TIE Fighters (96 points, max possible) go head-to-head with 9 A-Wings (99 points, max possible). These two groups are equal in health (36 hull each). The TIE Fighters roll 3 blues each (36 total dice) and each die hits half of the time (18 hits on average). The A-Wings respond with 3 blues each (27 total dice) and each die hits half of the time (13.5 hits on average). Uh, oh. The TIE Fighters are winning--have I just proven that A-Wings are terrible!?!? Nope, each of the TIE Fighter attacks will provoke a Counter 2 response, even if the A-Wing dies. That is 12 more attacks of 2 blues each (12 hits on average). So, the A-Wings will inflict approximately 25.5 hits on the TIEs' 36 hull, while the TIEs will inflict approximately 18 hits on the A-Wings' 36 hull. It is a complete slaughter--the A-Wings will usually carry the day (not to mention that the A-Wings are faster and are easier to command with their smaller numbers). That is the A-Wing's role--the destroyer of TIE Fighters (and Bombers).
Unfortunately, the A-Wings are less effective against TIE Interceptors. In a theoretical battle of 9 Interceptors (99 points) vs. 9 A-Wings (99 points), you are looking at the A-Wings delivering 18 hits on the Interceptors' 27 hull (2/3 damage capacity), while the Interceptors deliver 27 hits on the A-Wings' 36 hull (3/4 damage capacity). It is close, but the Interceptors have a slight edge. However, note that the A-Wings are more likely to live long enough to deal out more Counter attacks each. Furthermore, the A-Wings do one thing much better than TIE Interceptors do: they are much better at anti-ship. 9 Interceptors will average 4.5 hits per turn against capital ships, while 9 A-Wings will average 6.75 hits per turn against capital ships.
Thus, in conclusion, I believe that the A-Wing will probably find a place in my fleets, especially if the meta is filled with TIE Fighter swarms (which it probably will be).
EDIT: I realize that I forgot to include the Swarm ability for the TIEs in my calculations. I still think that the A-Wing vs. Tie Fighter match-up favors the Rebels, while the TIE Interceptor vs. A-Wing match-up favors the Imperials. If someone wants to figure out re-roll math, be my guest.
Edited by chemnitz