Hi! I'm one of the maintainers of this project and wrote the blog post, I'd be happy to answer questions if you got em!
If you have an AMD Framework the gnome-power-profiles manager has the inprogress patches from AMD already included and are probably better. Upstream Fedora is also in the process of evaluating `tuned` so in the future there may not even need to be a separate image for Framework.
Rebase instructions here: https://universal-blue.org/images/