Thanks for the heads-up, Greg.
Just for the sake of convenience, I copied the additional changes added in 12/3 update and pasted the list below. (This is not the complete list, only the most recent additions.)
AI
•AI will be more aggressive about pursuing Diplo victory if they are wealthy. (Added 12/3)
•AI more effective with building, moving, and using aircraft and anti-aircraft more effectively. (Added 12/3)
•AI more likely to effectively use siege units in a city attack. (Added 12/3)
•Better nuke targeting by AI. (Added 12/3)
•Tactical AI Tuning: Reduce chance of AI civs making "suicide" attacks. (Added 12/3)
•Multiple tweaks and bug fixes. (Added 12/3)
GAMEPLAY
•Increased city strength ramp-up based on technology. (Added 12/3)
•Catapults and Trebuchets now weaker against units but stronger VS cities, and reduced effectiveness of Archers & Crossbowmen (and their UUs) VS cities. (Added 12/3)
•Have culture cost for policies never go down (trading away cities to reduce culture cost exploit). (Added 12/3)
•Reduced effects of Forbidden Palace and Meritocracy (Happiness per city). (Added 12/3)
•Reduced points from Wonders & Cities, increased points for population. (Added 12/3)
•Reduced culture needed for first plot acquisition. (Added 12/3)
•New Building: Circus Maximus (National Wonder for happiness track). (Added 12/3)
•New Building: National Treasury (National Wonder for economic track). (Added 12/3)
•Unhappiness beyond a certain point breeds rebels within your empire, based on the number of cities a player has. (Added 12/3)
•Reduced amount of food needed for cities to grow at larger sizes. (Added 12/3)
•Tradition branch balance (Landed Elite and Monarchy improvements). (Added 12/3)
•Liberty branch balance (Settler training bonus now only applies to capital). (Added 12/3)
•Buildings can now no longer provide more Happiness than there is population in a city (wonders are excluded from this). (Added 12/3)
•3 new additional Natural Wonders added to gameplay, with accompanying “rarity” code. (Added 12/3)
•Multiple Tech Tree tweaks to address “slingshot” tech exploits. (Added 12/3)
•Killing a barb inside a city-state's territory now gives a 5-turn buffer where there is no Influence intrusion penalty. (Added 12/3)
•Reduced and balanced combat bonuses. (Added 12/3)
UI
•Additional updates to the Global Politics screen. (Added 12/3)
•Added game option to disable turn-blocking promotions and policy choices. (Added 12/3)
DIPLO
•Additional AI attitude tool-tips for cases that were not already covered. (Added 12/3)
MODDING
•Support for mods that perform major restructuring of the tech tree including adding, deleting, and updating techs, buildings, and units. (Added 12/3)
•Added GameEvents system for overriding Gameplay DLL specific functionality. (Added 12/3)
•Fixed "Reload Landmark System" mod flag to now refresh landmarks defined in "ArtDefine_Landmarks". (Added 12/3)
•Multiple SDK Updates (details to come with full patch notes). (Added 12/3)