Ah, excellent! I'll be delighted to see how much more you can grind them into the dust. I love a good challenge.
Create a problem, sell the cure (citations: vassals being unannexable at 50 or more liberty desire, development needed for buildings, primitive ship nerf + reform mechanic in DLC). I bet they get power back similar to the foreign core days, so that people will want to buy the DLC to play them at a level they once were by default.
But I could be mistaken. Maybe it'll be like Buddhism where buying the DLC makes them worse hehe. As long as there's still things to do, maybe it will still be fun. If the "challenge" is to player patience not so much.
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