An alternate way to look at settings could be handy - particularly colors and fonts.
This would duplicate the setting changes that already exist, and might still not catch everything since some of these settings are in spots where you set them via CSS.
This is prompted by me working on a site with 3 women who aren't quite sure what they want but "the colors aren't quite right" (so I go in and change colors in multiple areas) and the one that's killing me
now, "the font is too masculine" so I fiddle fonts for the body, page bar, header, etc.
Color is actually a bigger deal because there are so many different places where it gets set for different elements.