I think part of the point is, they're running out of regions where an enemy can reside...
However, I think you're actually right. What is most likely to happen in a situation like this (especially if the people in charge of CE, or similar monolithic empire-realm at the heart of such a bloc, are politically savvy and recognize the danger of complacency) is for some of the outlying realms—particularly those almost-most-recently added to the Empire—to be declared somehow in rebellion, and "reconquered." Repeat as needed to keep your populace in line.
We have always been at war with Eastasia.
I think the CE leadership is a little wiser than that, plus you all forget CE nobles know how to RP quite well and they enjoy it. Never really dull in the realm. mm what sad is everyone is switching their duchies to other realms... I am getting confused on who to speak to who not to speak too. busy busy bees
