Allow pinning anything from the Home menu to Global Navigation. I don't hardly use any of the top level features, almost everything I do is now embedded in the Home Sidebar, which means I either leave it open taking up precious real estate on the screen, or I have to click into home before I can navigate to where I want to go. Being able to directly jump to Inbox, Favorites, My Tasks would be a much more efficient use of my time and screen space.