Another thing that would be amazing would be that you could rearrange the columns of the files' area.
When I rename pictures, i would like to see in this special order the 'Name', 'New Name', 'Date Taken' and 'Sub Dir'. But when I work with mp3, I really don't care about the 'Date Taken'... I like seeing the columns arranged as they are right now. So, to be able to see what I wanted for the pictures... I would need to move, or hide coulmns that i don't need... much like Windows Explorer's detailed view.
I don't know how much work it might take to make those columns rearrangeable... but it'll sure be a very nice feature.