I just want to say that this kind of adding nation-specific mechanics has been what I envisioned to be the right way for EUIV to develop. Custom army units especially were something I was trying to mod, by adding a big amount of new tech groups. So, I'm very glad to see Paradox working in this direction.
Except for during the rule of Stefan Cel Mare, I don't think Romania was ever formed in the EUIV timeframe, and he only did it for a brief period (how many years exactly?). Still, it would be cool.Am I the only one that finds it funny that Romania cannot be formed while Byzantium, the second Rome, is alive, but Russia,third Rome, does not have this restriction?
What if once Byzantium falls there appears this "third Rome" race between the Romanian principalities and the Russian kingdoms, or even all Orthodox states?(Presuming that you somehow are able manage to form Romania before Russia appears)