I really liked the demo as well.But i went with CK2 right now (couldnt afford both). Comments on the steam forums seem to suggest the full game isn't as good as the demo. Few things missing.AI ordinary..
Yeah having played it a while longer I must agree that it lacks depth (and a good manual/civilopedia-style in-game help). It IS fun, but there are several things that remind you of what could've been over what it is, I guess.
Paradox is pretty good at supporting their games. I'd expect to see an overhaul of the game at some point, adding more features. Might take an expansion though.
The game has promise, but right now it's kind of bleh.