Ok so this is going to be a long read since i put some thought into this so bear with me if you can,
I know in Europa Barbarorum I there where military reforms, for certains factions based on what we know about them and that in the game you had to meet certain requirements to go through those reforms. I think thats a great feature for the game and I hope to see that again in Europa Barbarorum II but would it be possible if certain factions go through a government transition as well. For example, the Roman Republic goes through a government transition into the Rome Empire headed by a dictator or emperor after meeting certain requirements. The benefits of meeting those requirements could include ancillaries and traits bonuses or change in public order and can spur civil wars. I think there I many possibilities to chose from, i'm going to use the Romani as an example, I know the romani(roman republic) will deal with a scripted civil war similar to roma surrectum in Europa Barbarorum II except they use a rebel faction instead of a Roman Faction to save a faction slot. However what if you could recreate the Civil War in Rome which involved a certain "Julius Caesar" family member going to war with the senators after the senators ask him for a premature end to the family members consulship(the consulship being represented by a trait as planned) and retire(your family member disappears from the game. You would be given a notification where if you accept the senators demands, you avoid a civil war with a rebels faction.
If you decline however. The rebel faction would spawn in in your territory with family members heading them. Those rebels are in control of certain settlements in your in your factions and the rebel army is headed by a family member who sole purpose to to take over all your settlements and wipe you from the map. The senators are to be considered rebels from your point of view for the sake of game play. If you manage to take the settlements and kill the rebels family members(being the senators) your complete your mission and your "Julius Caesar" family member loses the train consulship and gains the trait dictator or something similar to that. This could add command bonuses influences and add public order bonuses or whatever you would like to add or take. Now how would the "Julius Caesar" family member be able to spawn the mission in the first place? Well, just like how you can transition from a Marian to Augustan military reform, you can transition from a Roman Republic to a Autocratic type government using your family member. All your family members needs is a Sharp/Charismatic/Vigorous trait or whatever would represents a "Julius Caesar" and also conquer a certain amount of territories or if you want to get historical, you can have the requirement be the Gallic territories which Julius controlled before the civil war. Once you've met these requirements and completed the civil war mission, your notified about the change in your governments political system and your faction is now headed by a family member who instead of retaining the given the trait of consulship, is given the "dictator" trait or whatever you would use. And when that family member dies, the next one to become faction leader and gains the trait of "dictator" ect.
Now this was only an example for the Romani Faction, let me add that I dont mean to make the game sound Roman eccentric because I know the team wants to avoid that. However, since there were other civil wars of this type, they could be represent in game, it adds a very flexible and dynamic edge to the game. These government transitions could involve socio-political conflicts or political-military conflicts like with the Seleucids and whatnot. Im thinking that these changes could not only give family member traits and ancillaries but also give them access to new buildings and units, think of the possibilities. This idea is partly inspired by how Europa Universalis works. Your able to change your government and gain bonus but also have to deal with the consequences of your actions. You have to weigh your decision about what happens if I go through with his. Now all of the sudden Total War isn't just about having to create units and take over this settlement and that settlement. Now instead of waging war, building units and buildings, you have to deal with political and social issues. You now have to manage your faction from not just one angle(build, conquer) but from different angles. And If the Europa Babarorum is able to improve the A.I. up to that of Euruopa Universalis where your allys actually help you fight other factions and better diplomacy deals, this would be the greatest mod in existence. I am more then willing to wait even longer if they can do this!
Thank you for your time!