I mentioned this last week to gus reiber in person, but filing for tracking purposes.
There are site sections, such as "Documentation" which could greatly benefit from a "topsubnavbar" type partial in the site design. That partial would be filled out with section specific navigation, e.g. "Knowledge Base", "FAQ", "Examples", etc.
I saw something similar on related project gus reiber was working on, which made me think of this.