GC is fine since its not simply pure space battles, its space skirmish that really doesnt work. Bwings do work well against the Vengeance unless there are some crusaders around. None of the ZC ships are invulnerable its just their comparative strength and the rate of their production that makes them nearly impossible to overpower...hence the space station rush.
With the Bossk/IG bug I would select on a point for them to move to and they would just continue to fly around. It wasnt until I repeatedly clicked on a point and forced them to perform some radical turn they would snap out of their pattern. It was weird; i got it a few times in GC.