In reply to Jonathan Christopher.

On sites with a lot of content, yours would be a great solution.

We noticed the draft/unpublished page issue because we had also been using the Nested Pages plugin, to do something similar. A quick glance comparing the two views, we could see the missing content from Hierarchy.

We also noted that Pages appear to be treated differently than the other content types. If pages were treated like everything else (or you had the option of doing so) then the other states would be seen.

Lastly, one of the other content types we use sometimes are Content Blocks, for formatting reusable content into widget areas. That must use something non-standard, as that content wasn't an option to include in the Hierarchy settings.