Not sure about the music scene. The Negril Entertainment Association NEA (RIP Kubba) has been trying to standardize the events (lower the bass, etc.) and it looks like there is some enforcement happening and justified protests:
http://www.jamaicaobserver.com/mobil...ties-_18224015

These things have a way of shaking themselves out. There is an election coming up so (tin foil hat on) these things may be related to that...

Visiting in late Feb so I will maybe be a bit clearer on the situation after that.