I'd like to see a history of my decisions/kingdom. Maybe just a chart showing the size of my happiness/treasury/population over time? Also maybe an editor so I could customize my king. I wouldn't want the game to get much more complex, gameplay wise, I think I just want more events/questions, and to better be able to reflect on how the game's going.
Incidentally, I love this game and I'm hooked on it. Great work.