- Trade system with trade goods.
- Enhanced republic to Monarch interaction.
- Naval combat
- River sailing
- Turn back time and introduce the Norse with proper features such as tings, raids, invasion of Christendom, etc.
- Layered de jure territories (Example: Roman Empire covering all the old lands, Byzantine Empire all its old lands, Western Roman Empire all its old lands, Frankish Empire all its old lands - at the same time. It would make for continuous border disputes between two kingdoms or empires, Denmark and Germany at Holsten for example.)
- Allowing for culturally dependent province+title names.
- More empire-building mechanics such as reforms and a move away from Feudalism in the later game.
- Privileges, allow a duke certain privileges such as attacking a foreign power or have his titles inherited by foreigners, or guarantee a title to always stay within a certain dynasty. Relations bonus as a result.
- Tyranny, allow a monarch to impose tyranny on his vassals, such as limiting a title to certain religions or cultures, take away the privilege to fight other vassals, etc. Province revolt increase and/or relations malus as a result.
- Allow an increase in maximum province holdings by tech...
(my edit)
- New holding types for tribes which cannot be used by civilized people without a income malus....
(my edit)
That's all for now.