I truly don't know how much market for this there would be.  I'm largely ignorant of UV mapping in the first place.  But I'm sure that twenty seconds for this process is less time than it takes to load a UV Mapper, load a figure, load a new UV map, and save the new mapping.  And even if it turned out to be a bit slower, it would greatly lower the number of manual steps, allowing even people like myself to operate it.