I have been adding a Nav bar to MoodleDocs. I really like it. See MDLSITE-1511 and MDLSITE-1516 for more discussion. Basically the nav bar gets rid of most of the stacking templates and it is fairly easy to add to a template.
At the present moment Chat module and Lessson module show different examples of nav bar and template use. In short, I like the Chat module page the best but I do not likee the double dead link at the top that says Chat and Chat module.
The bullet list in Lesson is where you would go to drill down more into lesson's features, such as Lesson settings. For me, when I hit that page I have to think where am I? I drilled down from the Activities template and I know I want to get to lesson settings.
Anyway, that is my logic. It is the visual dead two links in the nav bar I do not like. That is the worse of the two evils.
Other ideas, comments?