Just a small suggestion for the campaigns.
In the Hautevilles campaign scenario Wonder of the world. You gain unique technologies based on the civilization you conquer however it still uses the unique technologies that the civilizations had when the scenario was made and some have changed since then. Could what technologies you gain be added to the scenario instructions so you know what conquering each civilization does? That way it doesn’t have to be updated each balance change, but you can know what effect you will get upon conquering another civilization.