I like this suggestion. I too toggle back and forth between married names and maiden names on the index list constantly when working with files. It would be nice if they also added an option for women to appear on the index under both maiden and married names.
Legacy software lets you show both married and maiden names and even has a little symbol in front of married names so you can easily distinguish which you are looking at.
I currently use multiple genealogy software packages because not one of them has all the features I am looking for. It is a real pain to keep transferring GedCom files back and forth.