Certainly many people turn their music off (or have their own playlist) during multiplayer battles.
However, some of us like to hear in-game music to drive up atmosphere.
So why can't we get a wider range of dynamic music during multiplayer matches? I'm personally getting tired of hearing the same generic drum loop during battles and would rather hear what the composers made instead of making a personal playlist (plus it saves on CPU usage).
Anyways. I hope you'll consider implementing way more track options similar to story mode.