I've gone through the handbook and adjusted the headings from level 4 to level 2. I have also added at least a little bit of text between page headings and subheadings. Of course, there is always room for improvement.
Harking back to my days as learning designer (many moons ago) one of my toughest challenges was to get academics to author to this simple style convention.
Overnight you have implemented -- hey I'm most impressed!