I found the print book very hard to get through because it felt exceedingly preachy and almost like a contrived acceptance test document. Is the audio book easier to stomach?
If you make the progression *significantly* different, I'd be tempted to use a semver major change to indicate such, in case modpack authors are relying on your progression shape; but otherwise I think these kinds of incremental updates are fine.
Interestingly, Markdown has always worked for me, but I came to it as "Woah this is essentially formalised how I always wrote text documents in the past". I can see the parallels though. It's one of the things I adore about Rust - mandatory use of braces on `if` etc.