Is there anyway we could combine all the best aspects of these awesome UserScript and UserStyle enhancements into a single super script? If so, this could potentially be reworked for a pull request to the kbin project as a whole.
I made an end-to-end working prototype of this and defined a set of specifications for how to integrate people's work yesterday and will make a new post about it today.
You can probably just combine all the separate css files into one big css file.
Reworking it as a pull request should also be possible, however these "improvements" should probably be optional to the user so it will require lots more work to design a settings screen to enable/disable certain aspects while having it be comprehensible.