A simple solution would have been to have all religions START as generic, but then have the religion aquire traits over the course of the game. What traits it would gain would depend on the civics choices, leader choice and play-style of the founding civ. So, if you found the Hindu faith, and then adopt a Xenophobic view of different 'culture groups', then Hinduism in that game might aquire a Fundamentalist trait, which makes you more resistant to religious conversion, but also gives you a penalty in dealing with civs outside of your faith (even if they are from the same culture group).
The thing is, though, that anyone who ADOPTS Hinduism in this game will get the Fundamentalist trait as well. If, however, a Hindu civ changes its civics settings to Multicultural, then there is a chance of either a change in the underlying trait of Hinduism (from Fundamentalist to Ecumenicist) or a chance of an ecumenicist sect of Hinduism forming. Aside from that, though, I think there could have been some very basic starting traits which would probably have not offended anyone-these could have been:
All the Monotheistic Faiths (Judaism, Christianity and Islam) have a greater chance of converting other cities, but are also more prone to sectarianism.
The Polytheistic Faiths (Hinduism so far) have a lesser chance of converting other cities, but are also less prone to sectarianism.
The Non-Deist Faiths (Daoism and Bhuddism) have an even lesser chance of converting other cities, but are also even less prone to sectarianism.
Pagan Faiths have the least chance of converting other cities, but also the least chance of sectarianism.
These two trait systems could be fairly easily adopted into the game, without causing any real offence to anyone, as the traits do not accrue to any SPECIFIC religion (i.e. no-one is saying that Christianity is more prone to sectarianism, or religious conversion, than Islam or Judaism-it all comes down to how persistant you-the player- are in trying to 'spread the word', either with missionaries or through your religious buildings and the 'culture' they produce).
Well, here's hoping that this will be in for future expansions-at the very least.
Yours,
Aussie_Lurker.