A few ideas, I might forget some and post them later:
- Several new cultures – a few cultures important to the time period are noticeably missing, and some might even help in terms of balance: Volga Bulgar (in Cumania, to weaken the Cumans’ starting position); Berber (in North Africa, who are not only a large, broad population historically and nowadays, but who can also provide some conflict in North Africa and Andalusia as well); Nubians; and Pashtuns or some other east Persian group
- Agnatic-Cognatic succession where brothers (and their male descendants) inherit before daughters
- The ability for ambitious nobles/dukes in the Byzantine Empire to seize the Imperial throne for themselves – it’s not realistic having the same dynasty in Byzantium for so long
- Crusader AI should be coordinated, somehow
- The ability to choose grandchildren’s name, and choose landed childrens’ marriage partners – or at least approve of or deny them – I find it odd parents don’t have a say in their children’s marriages if they’re landed or living under another liege
- Several new cultures – a few cultures important to the time period are noticeably missing, and some might even help in terms of balance: Volga Bulgar (in Cumania, to weaken the Cumans’ starting position); Berber (in North Africa, who are not only a large, broad population historically and nowadays, but who can also provide some conflict in North Africa and Andalusia as well); Nubians; and Pashtuns or some other east Persian group
- Agnatic-Cognatic succession where brothers (and their male descendants) inherit before daughters
- The ability for ambitious nobles/dukes in the Byzantine Empire to seize the Imperial throne for themselves – it’s not realistic having the same dynasty in Byzantium for so long
- Crusader AI should be coordinated, somehow
- The ability to choose grandchildren’s name, and choose landed childrens’ marriage partners – or at least approve of or deny them – I find it odd parents don’t have a say in their children’s marriages if they’re landed or living under another liege