It'll be interesting to see what you're able to come up with. No rush on it though - this isn't a life or death necessity. I know what not to do with the current versions, so as long as I avoid that (pressing Stop for any reason), I generally don't have any issues outside of the occasional ROM that cuts off before my designated song length setting even when lists are ignored (P-47 is one of those).
I'm just happy to even have an arcade music player I can take with me. Listening to Dragon Spirit puts me in a good mood no matter what most of the time.