I dunno actually, I think you're balancing drama with 'jesus christ what the hell entropy god did these guys tick off' relatively well... Which is good! At least in my opinion there are far too many good potential stories that take easy and uninteresting routes with just slaughtering characters or force-feeding drama into things.
Jackie's pose in the 5th panel = so cute! I love your alien species! You make them so cool (and float-y) without making them one of those 'mary-sue species'. Same goes for the Doraks! (minus the floating)