So how about to let characters get old, and die some day, if they do not so on the battlefield, or by desease? Give them a birthday, an age of beeing able to do something in the world (like 15 or something, in the medieval time, men and women have to get adult very fast, and they have to carry some responsibility for their family, and so on.)
Maybe as a kind of "hardcore"-setting in options...And how about marriages?
And: maybe some kind of social standing on birth?
This can give some roleplaying-spice to this already very fascinating game
These are only a few ideas... but I dont know, how dificult it is to implement this...
Edit 1 sorry for my bad english
Edit 2 and no, i dont want LiF: The Sims