The world is a better place now.
Not only is a Vicky 2 much appreciated, I think the new expansion will bring absolutely everything I would want to a grand strategy game - mainly the addition of a roleplaying element (the idea of dynasties, ruler legitimacy, added options for Republics, etc.). For me, it's already bought.
Of course, for EUIII to be really complete, we'll have to wait for Magna Mundi to be adapted to the new expansion...