Since one may have more than one sharpening enhancement, it would be helpful of one could reorder them as needed. Otherwise, it is difficult to work out in advance how they should be constructed when the selected areas overlap. I have had occasion to more strongly sharpen small areas of an image than the sharpening applied to a larger, more encompassing area.
Thanks for the idea and suggestion! Our developers are working on this for a future update, make sure that you do not forget to vote for your idea 
