Just wanted to pop in and say the release that fixes hidden fields showing up on edit pages is going out now, so you should see that fixed in the next few minutes. I also double checked to make sure hidden fields don't generate prompts, and that looks great. :)
Customizing individual fields per page is also a great idea, but obviously ups the complexity of using each page so I just want to make sure I do it right and don't make it confusing. Just to clarify there, were you looking to be able to add fields specific to a single page (for example, adding a "Grades in school" field to only a single character page), or were you looking to just hide specific fields on a single page (e.g. don't show Height on this page, but keep it on the others)?
The latter seems like it'd be easy enough to do by giving fields a dropdown that lets you hide fields per page, but the former might take a bit longer to build to make sure it's clear the fields you add/edit from that editor only apply to that page, and so on. All doable, but I just want to make sure I understand correctly; I appreciate the feedback!