It is possible to make band with real playing players, nobody does it because the stage for it is already overewhelmed with "bard simulators". The tools to sync between few people are already in the game. And there is already a great mod for people that want to learn to play, btw. I don't want to write or promote mods here, but there is one that you can add songs and play them with controller as dancing game or rock band. I would be so happy if they add this kind of feature where you can compose songs and play them this way after. I know it will not work with midi files directly, but if you have all the notes, you can compose the song easily on console too and it will actually motivate players to learn to play, who knows, their bands may be quite better from what we have now if they had the chance. But nobody asks for improvements, because they already have "a way" that took over the stage.