For a full list of over 25,000 words of changes included in the broader Definitive Edition updates, you can always check the Official Age of Empires News portal. Age of Empires III: Definitive Edition - Update 61213

This update addressed several high-priority technical issues that were affecting the player experience:

: Resolved an issue where the deck rename dialogue appeared incorrectly in non-deck list areas. ⚖️ Civilization & Unit Balancing