We finished it and discovered that the Andros really didn't have much of a chance. We've done some talking with ADB and the forum there came up with a list of things to try. Because it's the only true epic campaign in SFB, we're going to try it again and see what works and what doesn't.
Toward's the end, our Andro player finally developed a strategy that, had she implemented it sooner, would have posed a major threat to the Galactic success. She started going all out to kill the biggest ship in our fleet no matter what the cost. I don't think it would have secured victory, but it would have been a lot tougher fight.