@nzcamel
The latest discussion about rule changes was in 2016, when @Krieghund listed the changes and explained that all content of the FAQ-sheets had been included into at that time new rulebook prints. (See https://www.axisandallies.org/forums/post/461656)
Usually, when commenting on rules, I compare “my knowledge” with the most recent rulebook version. But as this game has been broadly covered, tweaked, extended etc. there aren’t many questions open in these days. So I am afraid no one took on the effort to compare whatever newer rulebook versions.
I doubt there will be any rule changes - but the wording has changed here and there and the clarifications (as already said) have been incorporated.
Maybe @Krieghund has further details for us.