Thanks! I do agree with you in that warband has numerous great mods and playing vanilla is not worth it. However the issue I mentioned also appear in different mods as well, take one of my very favorite mod the 16th Century for example, every once in a while you take over a place, and the old vassals would soon betray or be exiled into totally alien lands. And this snowball would be larger and larger since no AI kings is any good at balancing neither lands nor relations.