After looking at capitalization more, the sentence case headings have grown on me ("Main story", "Version history", "Creation and development"), so I retract my previous statement--I'm fine with changing those. But I also found an annoying edge case: "Normal Route"/"Weird Route" sections.
I think we can all agree that proper nouns in sentence-cased titles should be capitalized.[1] This is problematic for articles with both "Normal Route" and "Weird Route" sections (such as Thorn Ring and Cyber City), though, since "Weird Route" is proper, but "normal route" isn't. This is what it looks like with common nouns sentence cased:
This looks really inconsistent. I think capitalizing "Normal Route" is the best option here, since sentence case "Weird route" looks really awkward when the section immediately uses "Weird Route" as a proper noun:
What does everyone think about this? "Normal route"/"Weird Route",[2] "Normal route"/"Weird route",[3] or "Normal Route"/"Weird Route"?[4]
Also, I forgot to say this earlier, but I'll help out with changing all the header links once we get to doing that.