Another idea is to increase religious pressure from Trade Routes by say, 50%, so it would be easier to get minority religions in cities.
Aesthetics would have been my go to choice to put it, I agree that Rationalism is probably too late to really matter. Exploration might be another option. If it stays in Piety, it certainly shouldn't be required for anything (or require anything for that matter), with or without Follower Beliefs included.
I assume that when you say "Rationalism" you are referring to Freedom (as in my post)? In any case, adding this effect to the Rationalism opener might actually be a good place to put it - it fits thematically and the beginning of the Renaissance strikes me as an appropriate place in history.
If the religious tolerance policy was broader, I could see it having a better effect. Say, instead of getting an additional belief, cities with followers of two or more religions gain some sort of boost to happiness, culture or faith output. That, at least, would be a more tangible effect. Right now, even if the effect comes into play, there's no guarantee that the pantheon belief that I happen to receive will even benefit me at all (Woohoo! +1 faith on dessert tiles! Too bad all of my cities are in the jungle...). I'd rather get a more general benefit than a gamble, personally.
Here's some possible ideas I'd rather see:
+1-2 happiness in cities with more than "X" followers of religions other than the majority religion.
+1 faith and/or culture for every two followers of religions other than the majority religion.
I would actively court trade routes / pressure from other religions if those were the benefits, myself.
+1 happiness per religion present would be an excellent addition to the policy - I actually suggested this as an Ottoman or Songhai UA back before G&K was released. (Personally I'd rather get both the belief and the happiness.)
One thing that I've been thinking about recently is that although Piety is great being available in the Ancient era, some of it's later policies are both more fitting and more effective as later era policies (Reformation and Tolerance especially, they should be Renaissance, and Theocracy somewhat, it should be Medieval). So what if
some policies weren't available until certain eras/techs were discovered? I'm pretty sure the code is already there so it would be an easy change.
This would, of course, have the added change of making the free Prophet unavailable until the Renaissance, which might be a good thing; it would mean slower religions (or enhanced religions) somewhat since all Prophets would need to be "hard-built" so to speak.
There is no way to keep that though, after their religion is enhanced AI basically use all their GPs to spread. I would rather them have it be the new majority religion but not erase all the others.
This idea is certainly worth keeping in mind. The code is there - one of the reformation beliefs halves the amount of the effectiveness of Prophets and Inquisitors, and I'm not even sure we would need to change the effect of the belief; it would simply make them 75% less effective.
===
So I think we have a few viable options here:
- Buff Tolerance by adding some happiness or another yield when there is more than one religion present.
- Move Tolerance to be added to the Rationalism opener or a tier-1 Rationalism policy.
- Make Tolerance more available by lowering the effectiveness of Prophets and Inquisitors generally at removing religions.
- Make Tolerance more available by increasing Trade Route pressure.
- Delay Tolerance until it's actually useful later in the game, by giving it a tech/era requirement.
Many of these could also be used in conjunction with other ideas.