I shake my head at whole "more rules--better 'smarter' game" premise. I guess that means that Go is the ultimate dumbed-down morongame for dummies then. I guess it's not deep at all and only for knuckle-draggers that don't know how to use a computer.
I don't know exactly what game you meant by Go. Global Offensive or Pokemon Go?
But both of these games have simple rules.
You cannot compare rules of multiplayer games with Single player games.
What makes those games fun are not the game itself but the people playing the game.
No matter how good the AI is it will never have real emotions so for replayabity in a single player games we have to rely on huge number of rules and features.
Playing chess against AI is fun for few hours only.
Sure there are some unnecessary rules that they can get rid of just like one said.
I think overall Civilization 6 is a great evolution of the franchise and I want them to stick to 1/3 design rule for this franchise.
Why Civilization 6 didn't do as well as some expected is because:-
A:-4X genre is not doing good.
B:-AI and polishing.(AI can be improved to use all the new rules and cheat more sneakily)
C:-Nostalgia effecting CIV franchise since CIV III.
Through the ages albeit a great game is not even close to being a popular mobile game.It is fun but Not even remotely close to Civilization series.