Or at least make every song playable on every stage. (or is that something you unlock later?) I love 75m, but it only has one decent song, and that one gets repetitive pretty quickly.
In fact, that would go well with the idea that someone had (can't remember if it was here or on GameFAQs) to be able to edit existing stages in the stage editor, which would let tourney players conform stages to their idea of fairness, and allow me to put the Douchuumann song, or however it's spelled, on 75m.