I have read all that the amiable lords have written above, and can counter-argue almost everything.
In the screenshot below, I broke the Aserai and also broke them a lot later in battle, but instead of dying or surrendering, they constantly took 10-15 people as in the screenshot and survived and annoyed me by looting my villages. I was very upset that I couldn't finish them in any way. That's why I propose to increase the death rate of the lords.
Many people write about the fact that if you increase the mortality of the lords, then there will be absolutely no ones who could fight, but this is not true. I'll explain why: If the lords put their lives first and don't go headlong hundreds of spears ahead of the army, they won't die. If they stand at the back of the army, as they did in real life, and give up if necessary ( you can't do that in the game mechanics, but they can just run away from the battlefield), then they won't die in vain.
For example, if there is a battle of equal, 200 vs 200 soldiers, then if defeated, the lord does not have to go himself and be wounded, instead he can leave and get a morale debuff in the following battles, and if he goes, he will either be wounded or die 50-50. And in battles where the lord has no chance, for example, 200 against 1000, then he just has to give up, so as not to die, this is much more reasonable than going to the battlefield and dying. It may be technically very difficult to do this, because you will need to improve the behavior of the AI, but as an option, I think it would be not bad to do it, maybe modders can do this? What do you think, gentlemen?