Rise and Fall is quite successful in emphasising different ways of playing – an improved advisor system includes recommendations from other branches, such as science, military, and religion – but it's much less successful in rooting out the issues. And being a Civilization expansion, it also brings a roster of new civilisations, leaders, wonders, buildings, districts, and units. Its aim, on paper, is to further push the manifesto laid down by the base game, and weed out the problems that led to game-breaking experiences.
That's where the game's first expansion – Civilization 6: Rise and Fall – comes in.
The big downside was the rather fickle and dumb AI, whose cluelessness in times of war led to some hilarious moments. Civilization 6 brought some big ideas when it released in 2016 with the introduction of Districts – city improvements that occupied their own tiles instead of sitting atop the city tile, a revolutionary concept for the series – completely changing how players viewed the location of a new settlement, and new systems such as Eureka and Inspiration playing a huge role in allowing for non-domination victories.