The OP point is to make more cultural victories possible even for large empire.
Why don't simply rework the policies as they are? You could set two mutually excluding branches like "Empire" and "City State" that help mending your weakness. Empire branch could boost happiness and culture while city state could boost production and gold for example.
I like the policies branch but i find them a little too obscure: they're like more a "one time bonus" rather than political choices that shape your game. To me they could borrow something from the political slides and National Ideas in Europa Universalis 3.
Why don't simply rework the policies as they are? You could set two mutually excluding branches like "Empire" and "City State" that help mending your weakness. Empire branch could boost happiness and culture while city state could boost production and gold for example.
I like the policies branch but i find them a little too obscure: they're like more a "one time bonus" rather than political choices that shape your game. To me they could borrow something from the political slides and National Ideas in Europa Universalis 3.