Aussie_Lurker
Deity
Don't want to dive into other's fight. I'm not absolutely against religion, but I need it to:
1. Work well. The religion spread in Civ 4 is quite bad.
2. Have some gameplay reason. City-state influence is quite weak, because you may not want to influence them at all - i.e. playing Songhai.
I didn't heard anything about these points.
So what's your problem with religion spread in Civ4? As I've said, the best method IMO, is to base the spread on the Culture levels *behind* that religion-either indirectly (i.e. the chance of a religion spreading randomly) or by spending culture to spread religion to a city. You could also have an Evangelism Piety setting which reduces the cost of spreading religion to cities.
As to #2, I think diplomacy/happiness should still remain the key reason for spreading religion-it just shouldn't be as set in stone as it was in Civ4. As I said, though, that was an issue with Civ4 diplomacy in general-not with religion specifically (as some people here have wrongly asserted!)
Aussie.