When you get a hang of it though, it rocks. Until you encounter something you did not know about, and it messes up your game, 50 hours into a Campaign. And everything crumbles before your eyes. You break down, sobbing. #EuropaUniversalis
I'm mostly having trouble with like not having seemingly key features since I don't have all the DLC. Like CK2 has a similar problem, but it's DLC are mostly just adding new people you can play as.