[p]Arable land now affects agriculture efficiency, more land means more opportunities for field rotation and sustainable farming[/p]
[p]Propaganda maintenance now scales with population, larger empires need more effort to maintain state messaging[/p]
[p]Soil fertility now provides even more food output from agriculture[/p]
[p]Agriculture decays slower and grows higher before hitting the peasant population cap[/p]
[p]Education policies now cost less Political Power to maintain[/p]
[p]AI improvements: smarter resource management, better food production (invests in agriculture, fishing, hunting, foraging), no longer cuts agriculture support when starving, implements new tax systems (tithes, minting, trade policies), researches late-game economic nodes (stock exchange, mercantilism, laissez-faire), maintains more diverse armies instead of over-specializing in a single unit type, and now reduces officer corps spending when running low on wealth[/p]
[p]Late-game performance improvements for AI civilizations (smarter rule caching) and rendering[/p]