It would be an awesome flavor add if each country (or at least culture group) had different interface, like HOI2. You could have marble coloring for the Italian states and maybe oak for the Brits. I don't know how complex the programming would be but just wanted to throw it out there. Another idea I had was portraits of rulers, although I could see that being very tedious. Looking forward to the game. Love the idea of changing coat of arms and total historical immersion!