It would be very nice, if you could implement an upload/drop-button in the frontend under or above the file list, where the user has the ability to upload files to the currently selected folder. Maybe also a direct drop of the files on the current selected folder.
At the moment you can upload in the frontend only in a predefined folder.
If the user has the appropriate rights, he can delete and manage files via management functionality, but there he has too many rights and can also change other things. Thus, we can use this feature only for the administrators.