One of my biggest issues with the current interface is the exclusive use of menus (toolbar and popup) for performing actions on documents and folders. These menus are very long and on some screen resolutions, require you to scroll the menu to get to the command that you wish to initiate. Providing appropriate buttons in the Preview window tabs and property dialog pages. In particular workflow actions, Check in/out.

The UI is quite outdated. It would be nice to see it upgraded to modern design elements.