Community feature list for last couple of DLCs

I am inquiring about the new content for the last set of DLCs and patches for Crusader Kings 2. Not what you think the dev team is working on, but what you, the community, would like to see to round out CK2 as a finished product. I am not an official paradox employee, just a fan who's curious. So, what would you want to be added in the last set of DLCs? China? More complex succession mechanics? A better culture and technology system? Expanding on government types? An expanded economy system, taking into account trade and province development (like Flogi's buildings mod)? Medieval inventions? Fire away.