I assure you we will never completely switch maps. I think a change to the map, if good enough, would go over pretty well with the general JB populace, but there is no way we could even make a majority of people happy with a total switch.
If I wasn't so lazy I'd love to learn mapping by working on a change to the JB map, and I'm a perfectionist so I'd get it pretty damn good. I won't, however, because I'm lazy.