(Advise starting a suggestions sub forum - one thread per suggestion, and perhaps make it a rule to make each suggestion votable.)
Since there isn't one yet, here's what I have to say after a couple of rounds:
1. We really do need an audio warning for flux overload.
2. Weapon sounds are a little thin, especially the fighter weapons. Recommend looking up what the chain guns on fighter jets sound like =) Also, I think you can safely do away with the ricochet sounds. It just makes everything feel small - like little car sized spaceships taking potshots at each other with 9mm handguns. Perhaps a cheap method would be to slow down the audio by a small percentage - that'll bring the pitch lower, and stretch it out a little, giving a sense of size.
3. Is there are reason why units don't full-speed-ahead when given move orders?
Of course, there's plenty more to talk about, but I think most of the other shortcomings are a result of this being an alpha version so we'll leave that till later.
Its an incredibly well made game so far, though. Enjoyable, and not too complicated. Can't wait to see what's in the next version.