As a member of more than 200 groups, the owner of about 10 groups, and moderator in a handful more, I am not the least bit interested in making adding photos to groups faster.
What I do support is maing it easier to selectively find appropriate photos to add (such as by tag or by title), then add those photos.
Too often, I've seen someone add hundreds of of photos to a group, a few of which may be relevant, because it was already too fast and easy to do so.
Austin