Trying to organize existing photos is cumbersome at best. If you're trying to organize a large group of images and you select some say a month old and move them to a folder, you are taken right back to the newest image. Also, limitations on how many photos you can view is hard to deal with.
I think you need a way to download photos. I know at least for the school i'm helping out, they uploaded all 4,300 photos into one folder. We need to sort and potentially download these for other needs, such as flyers, yearbook, etc. However, given i know you are not an image storing business, it would be nice to have that option.