I don't mind Rock Bands either. That being said I wouldn't care if concerts also went back to Great Musicians either giving them something else to do.I forgot about this. I don't necessarily dislike them, but controlling them manually is very annoying. They should find a way to make them automatically act like trade routes. Another thing, being bought by faith is just meaningless. They should be bought by gold and with a specific policy that allows them to be bought, because once you have more economic power and incentive, the greater the chance of global celebrities popping up there.
If not I think there needs to be certain buildings that go with each of them. Bring back the Opera House as an Industrial Era building able to store multiple Great Work of Music and Writing. Then let the Broadcast Center generate mainly tourism based off Rock Band concerts. They can still hold one Great Work of Music because there still are Classical Music stations.
If they act more like trade routes let them travel between a city of yours with a broadcast center and other civilization's city with a proper concert venue (amphitheater, university, stadium etc.).