Why should a vassal revolting cause other civs to make peace? Seems rather arbitrary in my opinion. The option to make peace should exist, however, because they are now an independent state. I would think that if I add any more "tax" rates (for example, a science meter) I would keep them all distinct. Otherwise it's super confusing, and less controllable, for a human player to understand the mechanic (which is really the goal of this update). And a trade route to a vassal makes them like it a lot more (as currently implemented in the dev build). Really trying to avoid tying policies, techs, resolutions or other things to the vassal system or diplomacy in general, as it doesn't seem like good behavior. I like all of these ideas, except the master being at war (unless they're losing). Vassals are not City States. The whole point of a vassal agreement is the agreement to protect them rather than annihilate them. Although I kinda like the troops in vassal territory causing a small diplomatic boost. Also, as already implemented, demanding from vassals is easier, but not guaranteed.