I feel like we already have both systems now, with the estate system providing more random missions that are better tailored to the current conditions of the nation you are playing ( the mission that gives you a subjugation CB on a nation is particularly good). I do hope Europa 5 carries over the estate missions.
The diet is the full realization of the old mission system, for all there is to criticize PDX, I think it was a very inspired move to reintegrate an old mechanic into the game the way they did.
Imperator romes mission trees are BY FAR superior. They are more situational, not only all about warfare and just more fun.
Yeah, Imperator's missions are what I see as the closest to an ideal implementation here.
Highly dynamic and situational, based on current geographic situation.
I wish it leaned more on the political and diplomatic side though, where you could have characters and nations being the target of a tree, creating rivalries, tension, and perhaps even civil wars.
Calling the diet has its downsides though, in the form of the 5% influence the estates get for 20 years, while the also 5% loyalty ticks down in like 2 years. Spamming the diet builds up their influence and leaves you with your pants down if you need/want to revoke a granted privilege.
That is a very good thing in my book.
Missions being completely detached from the rest of the game feels very cheap (and is one of the main points of this thread), while being integrated with estates gives a very clear sense of cause and purpose for the mechanic.
Giving influence is a downside, but it's not bad mechanically at all, it makes the decision to get a mission more impactful and interesting, not everything has to be bonuses on top of bonuses on top of even more bonuses.