I've just had a talk to Martin about the tabs that remain when viewing a users profile (or your own for that matter).
The remaining tabs have not been included anywhere within navigation and settings as some pertain to navigation and some to settings.
I am going to throw together a patch that add the navigation tabs to the navigation structure and rename the setting branch to better reflect it's content.
The biggest challenge here is making sure that the interface is accessible and not nested too deep, whilst still however maintaining a navigation path that will make sense to the user to ensure that things such as the breadcrumb trail still make sense.