-Citizens, freemen, slaves and tribesmen are now Upper tier, Middle tier, Lower tier and Tribals.
-Citizens/Upper tier provide a bit of manpower, Middle Tier provide a bit of income, and Tribals provide twice as much manpower as in the base game
-Tribals promote to lower tier, not middle tier (freemen)

-Assimilation and (most) conversion have been disabled

-Slaves/Lower tier and freemen/middle tier pops can both be moved manually, but as a result, they do not migrate. If orc pops migrate to a non-orc realm, they will move on to Carn Dum and serve the Witch King of Angmar within a year.

-Colonisation doesn't require country culture pops

-As units are 10% of the size (100), attrition weight, upkeep, etc. has also been reduced (more or less) proportionally

-Every 20th freemen (Middle tier) pop will also produce 1 base resource - 5% each

-It only takes 5 pops to colonise a province

-A 5-year truce is automatically applied each year between elf realms and the realms of the elf-friend humans, or at least the humans who respect elves such as the Rohirrim, woodsmen, etc. The effect can be broken via a decision, "The old alliances are dead" - but it comes with consequences for the rest of the game in the form of internal unrest.

-A -200 opinion modifier is applied between the Melkor religion realms and the good realms (Dunedain, elves, dwarves, northmen, mirkwoodmen, etc.)