The filepicker works great to manage just one file that is needed in an activity, stored in an associated file area.

It would be nice to have an option in the interface to delete the file instead of just being able to replace it and thus remove the only file in the files area associated.

Then for example the filepicker could be used for a much nicer user profile image uploader, when used with the preview media file code for the file picker (see MDL-29412) that would show a thumbnail of the user profile pic then we could replace the current kind of clunky interface we have now.