: Great Powers can no longer use treaty ports to bypass the markets of other Great Powers unless their power rank is higher than the market owner's.

Update 1.1 brought massive structural changes to the game's core simulation:

: Reworked how morale functions in battles, causing a base loss every round modified by casualties and other factors.

: Added authority bonuses for high government wages and improved visibility for "unrealized taxes" in the budget tooltip. Official Sources and Safety Victoria 3 Price history - SteamDB

However, the (codenamed "Earl Grey") was a significant free update provided to all owners of the base game. If you already own the game on a platform like Steam, this version and its subsequent improvements are downloaded automatically. Key Features of Update 1.1 ("Earl Grey")