So really, I don't quite get why it is never shown who is the victor at the end of the round. So why not implement it? Can't see any disadvantages in that feature, CM will definetely only gain from this feature.
Also, maybe change victory conditions a bit:
queen killed/nuke exploded = marines major
shuttle crashed, aliens still killed = marines minor
shuttle crashed, almayer evacuated = aliens minor
shuttle crashed, everyone slaughtered = aliens major
almayer self-destruct = draw