
Originally Posted by
konny
Yes, that's basically the mechanics. I would not consider it worthwile unless you have a free slot that you certainly would never use. It's also pure cosmectialy. You could as well give the King of Denmark the two other crowns as ancillaries upon conquest of Sweden and Norway, and make a popup text that tells the player that Danemark is now to be considered the Kalmar Union.
If you wish to grant them with new units and buildings you could also use an eventcounter that unlocks them in export_descr_buildings.txt when the requirements are meat.