Yeah the relationship system is barely used at all for now, battles won/lost and political disagreements in voting should play a much larger role to dynamically change relationships across the game.Yeah but ah... if i join Vlandia i may notice that Derthert and Ingalter are not on the best terms. They are enemies. However, with time they become best buddies. Relation between lords inside a kingdom is a not-existent thing in the current state of BL.
The same goes for Raganvand and Lek, they are enemies at the start of the game, and best buddies later on. And by "later on" i mean reaching T4 with my clan.
Things like lords in an army gaining relations with each other if the army was doing well or losing relationship if the army was defeated, maybe tie traits to it aswell and make the army leader the one who gain or lose more relationship with everyone under his command.