We're planning to decouple ironman from achievements (as in, letting you play ironman with mods but having specific requirements for achievements, including ironman).
Are there any plans for an official way to de-ironman a game? I don't see how there could be any possibility for cheating if it permanently removes ironman status, and this would allow us to switch nations mid-game once we've gotten all of the achievements we wanted, or to use the increasingly-competent Vicky II converter.