MP-like Game?

I'm interested in building a game like MP/EU4. The main problem with MP before was that it was too vast. Anyone could do anything. You could have posts with no detail to posts which are far too detailed. I think there should be more clearer objectives as to what you can and cannot do so that it's more game-like, but keeping it in the realms of realism so that you don't get posts about making dinosaurs in a factory or whatever in Germany. The point of the game should be less about militarism like EU4, but more focused on diplomacy and policy matters. Warfare should be a component of the game still, but it shouldn't be the sole point of it. To achieve this, I think there should be ideas that you have to research. This sounds identical to EU4, but I think that it's the best way to constrain the game so that it's realistic enough. Financing and economic management should also be more of a factor in the game. This is where EU4 really underperforms, and where MP had trouble. I think that there should be clear economic management ideas and budgeting. You should be able to choose how you collect your revenue, how you spend it. This doesn't have to be complicated at all. It just has to be functional and simple enough for the game to have an extra element of management behind it. All of this can revolve around the map format. All of these features can be spread out over in-game years so that you can't do everything at once. That should keep it interesting and offer advantages in the game. This wouldn't be a phuks game. It'd most likely be built on it's own website.