I have a project where we have a pretty deep structure of pages and because of that, we have used the "List sub pages" option.
Everything seems pretty fine so far except for the navigation back to the previous level.
When you navigate to a subpage, you have no way of going back to the previous level and you have to start all over again. Not very usable.
A button to go back one level or a clickable Breadcrumb should do the trick.
I hope that it makes sense.