Crusades are by de jure kingdoms not duchy any more, so you do really need a de jure Jerusalem to crusade for
it would be wonderful if you could seize all of the holdings of landed nobles you've imprisoned.
I started a thread in the bug forum requesting this. There was quite a lot of debate about it there, so perhaps you'd like read the thread and contribute?England to have feudal elective succession under Harold and gavelkind under William.
Make only infantry in stacks count for seiges. (i'm looking at you Mongols)
Expand the role and mechanics of the Papacy
- a college of cardinals, preference of membership given to prince bishops
- successors drawn from existing cardinals, prince bishops, or bishops, weighting to consider rank, traits, and piety in roughly that order
When my liege calls me to war, I'd like some kind of pop-up asking me who I want leading these forces. It's irritating that half my courtiers, all of my land-holding vassals, and my own character dissapear when France declares the millionth holy war against Beja. It certainly wasn't uncommon for an old, sick, craven, or even just disinterested lord to send a son in place of himself to lead his levies. I think this option would bring a lot to the game - for example the likelihood that an AI character will personally lead his levies for you would be determined by how much he likes you and what he might have to gain from the war personally. On that topic, I'd like to see the AI raising their own personal levies for their liege with very high relations and/or a good reason to join the war effort.