At a minimum, it would be nice if the file chooser allowed the user to rename
and delete file from within the file chooser. I do not believe that such a thing
would add too much complexity to it. Perhaps a user could right-click on a file
in the list and receive a context menu that would allow such operations.

Furthermore, and though I admit that this might be a bit more complex, it would
be nice if the file chooser allowed the user to copy, cut, and paste files as to
paste them into Nautilus or into another directory.

It seems probable that some may complain that these changes make the file
chooser too complex; but quite frankly, I believe that it will, despite its nice
appearance, be a bit antiquated until such changes occur.

I cannot tell you how much I yearn for such a feature.