allow users to move the location of an existing file.
I open most of my files from "Downloads" and need to move the version I work on into an organized folder. There's no way to do this from an Office application once I have opened the file. I can Save in the original location, or Save As A COPY in another location, but original I no longer need is still there. Mac Preview allows this: when you change a file name you can also change the file location, and it really simplifies the process of organizing my files.