I've been testing this long before patch. AI not just builds much more fighters and bombers but also uses them much more intensively. Especially bombers. My previous game I was bombed to the point close to surrender the game as I was slow with anti-air and just keep hiding my units in cities and encampaments. From other hand AI is still not very smart with their bombers, as it sometimes fixes itself on bombing something to the hole in the ground (like one of my encampaments) but fails to send ground unit to capture it. Then on another occasion I attacked AI city with submarines and next turn bum bombers from above and my 2 submarines gone. I've been experiencing things like that for some time already and was suprised why people complaining about air combat. I've even asked community for clarification: https://forums.civfanatics.com/threads/what-exactly-is-wrong-with-air-combat.632459/ Only after been confirmed my games are really different I've released the mod in question. My theory is that willinginess to use air units is somehow related to the number of air units AI has. More it has, more frequently it uses them. Something like reserving a few air units for something really special and using more freely all the "surplus". But I cant really explain why it works like that. The proof is in the pudding, or how is it said in England?