Why would any text string be wasted by this? A level can hold up to 255 text strings... JCS supports up to 50, which is already impossible-to-fill-up-much. As long as the event's Filename parameter supports TextIDs up to 255 I don't think anyone is ever going to run out of text string space.

Oh and btw, I'm in favour of a Set Music event, in case I haven't already mentioned that before