It would be nice if you could easily add pages to the navigation menu.
Right now, when you add a link, the only options under target type are 'Home' and 'Internal path / External link'. Next you'll have to type in the exact path to your page. It would be a lot easier if you could just start typing the title or name of the page and a dropdown would show possible pages.
I think this could be linked to the autocomplete links feature request.