I could do Blue and John Crow but there is nothing really to say on the basis of my visit!! The interesting areas got knocked out during the "deferral period" ( "WHS was called "Blue and John Crow Mountains National Park", but large parts of national park were moved to buffer zone during final nomination stages") and I was left with a very "minimal" core zone entry! Nannytown is the main thing to see in what remains plus possibly the Blue Mountain summit but am unlikely to go back to Jamaica for them - especially as already have both T List sites at Port Royal and Seville "in the bag" if they are ever inscribed.
I think it would still make a good review, especially the part about the buffer zones. You don't have to cover a place 100% to have an experience there.