Currently, the game allows the player to create some historical (or somewhat historical) cultural unions, such as Great Britain or Spain. However, if the player doesn't (want to) go the historical route, they are left with a problem of either ending up with a country with many differing unaccepted cultures, or eradicating those cultures, which just feels wrong. Of course, you can in principle get other cultures accepted in your realm, but once you become large enough, it's no longer feasible to gain 20% base tax from non-state-culture provinces.
I think that a solution to this problem could be either a decision or a new government type, Federation. A decision ("Adopt federal administration", much like EU3 had "Adopt imperial administration") might work better, because I would imagine many government types being able to do that.
The requirements for federalizing your country could be a certain Admin technology level (perhaps 10, as with other country formation decisions, or even higher, to represent rather modern thinking for the era) and a minimum number of non-state-culture provinces, perhaps also a minimum number of total provinces (so that you don't get a Federation of Hesse or Armagnac).
The result of the decision would be a significantly reduced threshold for accepting other cultures, perhaps an increase in Trade/Production power (less centralized government allows more free enterprise), but a reduction in tax income (less centralized government leaves more money to regional governors) and perhaps an increased build cost (less centralized planning of infrastructure). In addition, the cost and duration of changing a province culture could be significantly increased, to mimic the cultural independence enshrined in the federal agreements; perhaps the same could go for missionaries.
What do you think? Is this a reasonable idea at all?
I think that a solution to this problem could be either a decision or a new government type, Federation. A decision ("Adopt federal administration", much like EU3 had "Adopt imperial administration") might work better, because I would imagine many government types being able to do that.
The requirements for federalizing your country could be a certain Admin technology level (perhaps 10, as with other country formation decisions, or even higher, to represent rather modern thinking for the era) and a minimum number of non-state-culture provinces, perhaps also a minimum number of total provinces (so that you don't get a Federation of Hesse or Armagnac).
The result of the decision would be a significantly reduced threshold for accepting other cultures, perhaps an increase in Trade/Production power (less centralized government allows more free enterprise), but a reduction in tax income (less centralized government leaves more money to regional governors) and perhaps an increased build cost (less centralized planning of infrastructure). In addition, the cost and duration of changing a province culture could be significantly increased, to mimic the cultural independence enshrined in the federal agreements; perhaps the same could go for missionaries.
What do you think? Is this a reasonable idea at all?