(This is my first controversial idea for this project, so by all means tell me to forget it).
Sphinx now uses the Alabaster theme by default. In my opinion, Alabaster's high-contrast, large amount of whitespace, and typography lends itself to be far more readable especially for prose documentation.
I moved urllib3's documentation to Alabaster and it's largely been positively received. I also use a variant in the documentation for several other projects (nox and google-auth).
Is anyone opposed to us switching?