I believe a conscious decision was made back in the beginning that the site was not intended to become a photo repository, and no photo editing software was included. Some of us have been asking for years just to have the ability to change the display order of photos on a profile, but not even that one has gained any traction. I realize that it could become one of those sinkholes for a developer -- i.e., I want to rearrange, you want to rotate. Soon someone else will want to crop and resize, and then remove red eye and adjust colors, and then sharpen and clone and heal, and then ... on and on.