So remember when the developers said no more new civs after DE release? What caused the devs to change their mind?

So I recalled I read an article that they said that after the Age of Empires II: DE release, they said no more civilizations will be added after Definitive Edition, but they said they are open to new campaigns.

And now here we are with the new expansion (based on western Europe and the Mediterranean of course) with Lords of the West, being the first expansion in Definitive Edition and they've decided to add two new civilizations (Burgundians and Silicians), but at least for bonus points, we least have a playable campaign for one of the older civilizations (Britons). With that being said, that does give me some hope of seeing Tibetans as a playable civilization in a foreseeable future (providing if the Chinese government allows it, but it'll probably risk of facing the banhammer).

So what caused the developers of after the first anniversary of Definitive Edition that they made an unexpected announcement of a new expansion with two new civilizations. Is it because of player feedback? Or it because it's more interesting to have a campaign where the player plays as one of the antagonist factions from the older campaigns (when I looked at the new achievements, it mentions William Wallace for the Edward Longshanks campaign and one of the Burgundian campaign achievements mentioned Joan of Arc), and it's more appropriate to have an appropriate Burgundian civilization than using Franks as a "placeholder" civilization.

Which also brings up another question with the older campaigns, since many of the old campaigns had Franks being used as a placeholder civ for Burgundians, will the older campaigns be updated with the appropriate Burgundian civilization?