I don't use Advanced uploading of files this way so I'm not sure, short of testing it out, how ours works, but if you are really keen to let them see your comments on their word doc without assigning a grade -then might it not be a workaround to hyperlink within the actual feedback text you give them to your uploaded,commented, word doc? That way their seeing it isn't dependent on any grade being assigned or not.
Assignment
Giving students feedback before a grade is given
This discussion has been locked so you can no longer reply to it.