Out of curiousity, having never worked in the business of making websites, what would be accessible to a designer? Jinja2?
Honestly seems like there's a bit of a gap here. Would be an interesting case for copilot tbh— here, take the old export and the new export, and make me a PR applying those changes to the templates in this repo.
[1]: I was briefly an intern at a web shop in the late 00s and it was one guy doing Dreamweaver and the rest of us coding PHP around the assets it produced.