Let me suggest an enhancement when hovering on thumbnails. It would be nice to add some of the file informations: uploaded date, file type, dimensions and file size in addition to the title and the file name.
The plugin called Folders (developed by premio.io) gives some of these extra details while hovering on thumbnails. However the thumbnail doesn't size up on hovering.
I'd like to have both the size up and more file detailed informations when hovering the thumbnail with WP Media Folder.