I've noticed this situation a few times: playing as a king who has been on the throne a while, I form a new empire. Instantly, I get the new ruler malus with all my vassals, even the ones who I've ruled for decades. Is this a bug, or WAD? I can see a malus to the vassals newly conquered, but it doesn't make much sense for vassals I've ruled for decades to be wary of me just because I've put on a new hat.