The neat thing about the new empires is that it gives you something to shoot for once you've already got a portion of that potential empire under your control, but it does kind of seem like an awful lot of "king of kings" to be floating around for what is essentially a bigger de jure kingdom. How about instead of forcing in empires where there doesn't necessarily need to be new empires, to use the dynamic de jure regions in 1.05 and add events to expand a kingdom in a particular way? Like, if you like the borders that your Franconia empire has, instead of dealing with advancing the kingdom that way, put in a decision that allows you to expand the de jure borders of the kingdom of france to include those duchies if you have all of those duchies under your control for a short time?