What makes war and peace times different in EU4?
So, most likely, EU4 also needs some active gameplay mechanics with visual response (player-controlled models that are moving in peacetime) instead of even more once-a-year-click numbers.
Maybe, Paradox will understand this and avoid falling into the same trap of numerical values.
P. S. Do not get me wrong, I like the concepts of estates, development, etc., and presented corruption + states, but their implementation could be much more player-involving.
The Forum already has various propositions of such implementation, so I won't explicitly name some over the others.
I agree with YuriiH when he says that we need more moving parts other than the soldiers to improve the player's involvement and fun with the game, especially in peace time. So my suggestion would be to add more "agents" traveling through the map, and create different layers of agents that could be tied to the map mode (so, when you are in Trade map mode, the soldiers would give place to the merchants and caravans). For that to succeed though, many systems would have to be revamped, like trade and diplomacy, so I don't think it can happen for EU4 anymore, but I'm gonna suggest it anyway...
Diplomacy/Politics
Make Rulers, Diplomats, Advisors, Spies and Colonizers have avatars and travel between your provinces and to other countries to perform different actions. This would be similar to CK2, but with realistic travel time (no more instant teleporting). Also, you should be able to see where the Rulers and diplomats of other countries are as well, and that would open new interactions, for example:
- If a Ruler (who would act like a more powerful Diplomat when he is not leading troops) or a Diplomat is in your capital improving relations with you, you would be able to improve relations back with them without having to go to their capital.
- If a Ruler or a Diplomat is inside your country at the moment you declare war on them, you would have the option to capture/execute them to destabilize your enemy, greatly impacting your relations.
- If two rulers are in the same place, it would give a massive boost to the improvement of relations.
- You send your spies to the enemy province you want to claim, to your own provinces to try to uncover enemy spies, or to another country's capital if you want to perform espionage actions.
- You send your advisors to specific provinces to give minor boosts to things like unrest, autonomy etc.
- Colonizers would be able to walk from one colonial province to the next one, instead of having to go all the way back to the capital and then travel 500 days to go back.
- If you are Italy and you want to improve relations with Ming, you would have to either put your diplomat on a boat and take him there or make the poor guy walk through Asia, no more teleconferences in the 16th century
Trade
I would also like the Trade system to be more dynamic, especially the inland one, with each country having real Caravans (I'm not a fan of the abstract caravan power) and Merchants competing for power over the nodes. I believe this could be impacted by Diplomacy, so a country that has negative opinion of you wouldn't let your merchants and caravans to trade in their land, and if you are at war you could also attack the enemy's merchants while having to care for your own. The current embargo mechanic is also very abstract, i would like if you could have your merchants and caravans actually engaged in embargoing your rivals in specific nodes.
I think that by making these important parts of the game as visually engaging and dynamic as operating soldiers at war, you could make the "tall" and peaceful gameplay at least somewhat as enjoyable as the warmongering one.