Currently mission bosses have no unique music. This is most prominent in The Floran party and Erchius mine missions, where there is no distinct change of pace between bosses and platforming/puzzles. In Terraria (sorry), bosses have their own music, which are the best tracks in the game by far. This makes the bosses seem more awesome than they really are. The same thing could be done in Starbound, and I know it can, because this game's soundtrack is one of, if not the best I've ever heard from a game. Boss music would would make the existing mission bosses much more memorable and possibly a thing players would want to come back to to fight again just for fun. I know what the Starbound composers are capable of and I know they can do it again.