I certainly appreciate the pedagogical purpose; what you did there goes beyond any pure TeX programming I’ve ever tried to do. My suggestion was to use Pandoc

I certainly appreciate the pedagogical purpose; what you did there goes beyond any pure TeX programming I’ve ever tried to do. My suggestion was to use Pandoc to create a LaTeX document. You can easily tell it to use RevTeX or any style required by a journal. The only friction with my approach is when you need to work with coauthors or editors on revisions. EDIT: I think I caused some confusion due to my sloppiness. I should have written “constrained to only writing in LaTeX”.