In EPi 7 (and previous versions) it was easy for editors to see how big a file was. But in EPi 7.5 that information isn't avaiable. That's a big drawback. So I (and the customer I work for) suggest that you make it possible to see file size, and if possible when the file is an image see how big (in pixels) the image is.
This is in the backlog, along with other assets pane improvements, however I cant give any estimate as to when it will get done.