I think it might also help get rid of some of the older characters if there was a way to pass down estates/lordships/dukeships.
Say you have a 60 year old character, it's very likely that they would have grown children. Make it so there's a way to let them inherit everything from you so that when your character dies, they get it.
Right now, I have Mariah as the sole priestess of a new religion, I didn't want her to die because then I would lose all of my titles and stuff and then I'd have to wait forever before being able to make it with a new character.
If there had been a sort of inheritance, I would have been way happier with her dying in order to pass it on. Same thing with the religion, If she dies, I'd love for there to be a way for an heir to take over.
Wounding as well should be a much bigger thing. Very few people died in actual battles, it was almost always afterwards with infections. Being lightly wounded should have the chance to be a death sentence but not actually stop you from doing anything. Maybe make it so the further you move/train/participate in battles, the higher chance of the wound festering and getting worse. Then as it gets worse maybe you're given an option, Amputate a limb (with in-game effects) or wait to see if it heals.