Not to change the topic (or maybe that is what I'm trying to do) but one thing that I've always liked to do (and may or may not be historically valid for this time period) is have the option to carve new states after wars are over as part of the peace treaty. For example, a strong German Minor begins to eat up all the small one-province minors. France declares war when Luxemberg falls and takes Luxemberg and a number of other provinces. Instead of asking to make these lands part of France they should be able to demand the reistatement of their independence, as Vassals of France of course.