I work with an expanded tree structure, to better get an overview of my projects, and it's nice that you can open files from a sub-level, without having to open the parent folder.
However it would be nice you could also add files and folders on a sub-level, without having to open the parent folder. That's currently not possible.
Thanks for your feedback. You can add subfolders to folders by clicking on the menu next to them and selecting "add folder".
If you use the Plug-in for Internet Explorer you can upload to any folder in any project from inside Office applications. A Projectplace button will be placed on the toolbar inside your office application.