It would be cool to allow more than one mapping to be used in any given export. That way the export mappings could be developed in a more modular fashion, rather than having to put 'everything' an export needs into one. You could also test a new mapping by adding it to a list of mappings on any given export. If the export failed and you needed to revert you could just remove it from the list of mappings for that export. Also it may take some time to develop (type in) a complicated mapping and since it is an all or nothing situation right now, that makes things precarious. For example, I'm contemplating mapping all our majors and specializations, but there are a lot, and yeah, well, I think you get the idea.