I agree. Age of Empires II Definitive Edition is an incredible improvement upon the 2013 game with all its user friendliness, shortcuts, new features and the list could go on and on. I also have AOE I Definitive but I can’t play it for long because it is just too basic in comparison.
I would even buy a paid expansion for AOE II Definitive Edition with new campaigns based on the ideas of AOE I, maybe also add the civilizations since AOE II can also include some ancient civilizations.