I think the end result is going to be everything about using Keyboard Maestro in the wiki, and only other stuff in the documentation. So eventually the documentation will probably just include the first five or six chapters and the last three, and most of the rest will move to the wiki.
And maybe eventually even the remaining will move to the wiki and the documentation will disappear, although perhaps the admin details and the purchase section has to be there, I’m not sure.
The whole issue of versioned documentation remains problematic, but wont be an issue until 8.0 which is a long way off yet and so some solution could be found then, perhaps just duplicating the wiki at that point and preserving it for the 7.x documentation state.