Paradox is devolving like Creative Assembly, Victoria 2 from what I hear is simplified, and at present has a game breaking bug in the release version that causes full scale revolts to explode across entire countries. If you play up to.. 1880 I think it was, you'll see dozens of countries just buried in rebels that never disappear locking the entire world in an anarcho liberal depression.
Victoria 1 was complex but good, though with some interface problems. Europa Universalis was fantastic but needed a better AI. HOI was more complex and detailed, though slow with too much army micro management.
Then come the sequels and Paradox for whatever reason forgets how to make video games. HOI3 was too "accessible" Aka simplified to the point of boring and riddled with bugs. The only thing they managed to improve was the warfare.
Victoria 2 is looking to be more "accessible" than the previous with its own mess of game ruining bugs, can't say more than that because I haven't played the full game yet. Holding off on a purchase until its own forums have something good to say about it.
I can offer a prediction too about how the next Europa might look, just think of a way it can be simplified and broken, and Paradox will do just that.
Paradox used to be one of my favorite developers, I don't know what happened to them. It's depressing.