Just had this idea as I was thinking about religious spread. We are often concerned about the balance of religious owners vs non-owners. So I had this thought that would both help that, and encourage more religious mixing and spreading in the game. Idea: Remove the pagoda as a religious building. Instead, its becomes an effect (maybe called "Religious Tolerance"). All civs that don't control a religion once all religions are claimed gain this effect in their cities. If they ever control a religion in the future, they lose this bonus. What this does is create two distinctive styles of religious gameplay. If you own a religion, your playing the typical game. Spread your belief, enhance, yada yada. But now you can play religion completely differently, don't bother with owning and go religious mixing. Court every religion you can for really nice bonuses. So now, non owners get a way to bridge the gap that makes sense with flavor (the benefits of religious tolerance). Further, they are less likely to resist religious spreading, which gives religion owners a place to spread more and compete over religious dominance. I think its a win win for everyone!