New feature: Introducing a new file experience for groups in Outlook on the web

How come you can't create a new OneNote file from the Files area? 

I do think it's confusing to have Files and Site.  Makes it seem like documents are in mulitple locations even if they aren't.  Overall I'm really struggling with group navigation.  In and out of Outlook is confusing in my opionion.  I keep expecting the same top navigation no matter where I am and it's different depending on if I'm in sites or Outlook.  I really think getting the top nav to be consistent would be a real win.