I don't think adding effects onto dominant culture is a terrible idea. is this one in particular good? eh I don't think it will have that big an impact personally as dominant tends to come a good bit later in the game.It seems like the general consensus is no for river cargo ships because there would be no clean way to implement it, which is OK. I have another idea for a congress proposal that I'm interested in hearing people's opinions of.
Idea: Cultural domination should give +50% religious pressure.
Rationale:
- Military domination (i.e. vassalage) currently gives +100% religious pressure. In my opinion cultural domination should do the same thing, but to a lesser extent (the people are pressured by your now dominant culture to adopt your religion, rather than via military threat). If a civilization has completely adopted my culture, why do they not care about my religion?
- Religion benefits all civilizations, but there are no culture civ focused bonuses to religious pressure that I'm aware of. In contrast, military civs get the +100% religious pressure to vassals, and typically take Fealty and get the +50% religious pressure to foreign cities with other religions. Seems odd since I would think of warmongering civs as using aggressive proselytization with raw faith while a peaceful cultural civ would rely on word of mouth and the spread of culture to spread their religion. Diplomatic civs get the bonus religious pressure from their many trade routes. Scientific civs don't have a religious pressure bonus that I'm aware of, but it seems kind of thematically fitting that a scientific civ wouldn't prioritize converting others to their religion as much.
- Currently having a shared religion already gives a tourism bonus, and with the next congress it will scale by the number of converted cities. Therefore it would be too strong to give a bonus to religious pressure with lower levels of cultural influence, since this would create a positive feedback loop. But once your culture is dominant with a civilization, the tourism bonus from shared religion is irrelevant.
- I believe this would create a fun and unique mechanic to having a dominant culture. It feels like there should be some kind of special reward for maxing out your tourism with a civilization. But personally I never even notice my culture going from influential to dominant, because the small change in trade route and loss of unrest time bonuses are not really noticeable for a cultural civ. This could create a reason to try to reach dominant with other civilizations to overtake their religion with yours, helping you to spread your religion to other civs and get a small tourism bonus there, etc. I think it could be a fun mechanic with civs like Arabia or a cultural Byzantium.