You see though, this is why I actually veer away from talk of altering the religions themselves. I find that most of the religions-at their core-would be almost impossible to describe in terms of 'Specialists Allowed', 'Bonus Research' and other gameplay mechanics. Civics, however, represent the more 'sectarian' elements of religion and-hence-can be better defined. Pacifist, Militant, Orthodox, Evangalistic, Ascetic, Reformist, Fundamentalist, Free, Sacrificial and Organized are all things which can be broken down into gameplay terms-and thus give us the greatest power for differentiating religions w/o pigeonholing a specific Faith. After all, isn't that what 'what if?' games are all about? What IF Bhuddism had adopted a Militant approach-would that have changed relations between the various Bhuddist nations, or Bhuddism's spread through the world? What IF Judaism had been Evangelical, and actively sought new members for inclusion into the faith? These are the possibilities we can play out WITH a more expansive set of Religious Civics. If we also add new effects to each one, then it allows for even greater flexibility, IMO.
Back to the Original Post, though. I do wish they had retained the 'Strength' factor to religion. After all, my Christian Holy city is gonna have a very different attitude towards Christianity than it is towards that Bhuddist faith which only made an appearance 1500 years later.
What could happen is that a religion has 4 strength 'levels'-with only the Holy City of a Faith able to achieve 4. All cities which get a religion (including the Holy City), get Strength 1-which grants you the simple +1 Happiness and Culture Bonus (or +5 Culture in the Holy City). At Strength 2, you can build a Temple and Monastary in the city, and the culture bonus increases by +1. At Strength 3, you get either a bonus +1 Happiness or a +1 Culture AND you can build a Cathedral-type improvement in the city. Religious strength may also impact whether you can build certain Wonders in the city.
Now, strength would increase over time (based on the length of the game, whether it is your State Religion, and how late the religion appears in the game), but building a Shrine would automatically boost Strength by +1, as would adopting it as a (hence the Str. 4) The down side might be this. The stronger a religion is within a city, the longer it takes to build improvements of 'weaker' faiths. So, for example, a Strength 2 Christian city may take 25% longer to build temples and monastaries of the Strength 1 Bhuddist faith. This might help to stop people from 'Spamming' religions (though having civics with negative happiness from non-state religions would have the same effect IMO). Anyway, it may be worth a modder with SDK abilities looking into this. I know I would certainly play games incorporating such a mod!
Aussie_Lurker.