For us Folders Hierarchy users, it would be great to have the option to move the little folder icon off of the folder art - perhaps to the title line, or even hide it altogether.
I know the icon is used to tell the difference between files and folders, but for the folks with a clean folder structure (i.e. no folders containing a mix of files and sub-folders), hiding it wouldn't be a problem, especially when using the "Hierarchy Files Zoom Level" setting.