Bill- I also come from a long history of controlled documents. I remember the gnashing of (engineer’s) teeth when the company decided we had to be ISO-9000 compliant.
But, I really don’t see a need for document control of the documentation. Most people don’t run old versions of HA. If they are, then they probably installed HA three years ago and never wrote another line of YAML; and they would never pull an older version of the docs anyway. The docs are for people running the latest version of HA. Period. No one will ever update an older version of the docs. Ever.