myabe you could split the world in 4 9as an example) fractions that would compete with each other. each fraction can have any tribe inside it and people can move from one fraction to another. I believe it will change the game dynamic, so that it will be difficult to state who will win by the third month. Currently many servers have one dominating meta by the middle game with control over half of players. It makes the game goal to get as many people as possible in your kingdom and then relax. lets say it would be republican fraction, democrats, anarchy and monarchy and one fraction wins. maybe there is a smart way to combine it with kingdoms.
So my question is how likely changes to main idea of the game to improve the gameplay?