The document reads more as a thought experiment, a long-term project, theorizing, advice on picking and choosing what you will from the document, philosophy on the history of the game and where 3.x sits in that context, as well as how it was shaped over the course of its lifespan and what those implications are. From reading the document, I don't get the idea that the author would hand this to a new group and ask them to read it over and adhere to it all. It is so well thought out and written that I imagine that Fizban would be able to bring most of these changes up on the fly during play, making it easy for the group. Many of the changes are individual changes to how classes work, so a player would only need to know what the document says about their class. I also imagine this document would be approached differently between a long term group that Fizban was playing with for years vs some newer people who may be strangers.