It's not really logical. Pantheon is pantheon. If I believe in Spirit of the Deserts and then some great prophet comes and says SotD had a Son and his name was Brian (story unrelated) then I still believe in those SotD, right?
Except the fact that religion is already glitchy enough as it is (As I recalled, it's so hard to fix those bugs because people are so rigid in their beliefs that they don't choose anything else until someone else choose a different belief that is bugged and then have them report it which they usually don't which is why the All UA Get Bonus Belief mod was never introduced by me, but that's a different topic for now), adding this neat fix might bug religion once more again.
This works with your own pantheon and founded religion, so you're going to have those who may oppose this "hot and new religion" because the government telling them to try it.
But it is logical, from a mechanical point of view. If followers of your religion and pantheon are even, then the city doesn't have a majority. If no religion has more support than others, then the city is omnist and its rule is lay. You could argue that even in that case, a city could get a small bonus from every religion that has followers in the city, but it would be quite difficult to do with just modding tools.
I think this pantheon is really good. Its like having spirit of the desert on every luxury tile. Sometimes they even give you 1 or 2 extra gold per turn. Once you have a little bit of gold you can buy all the other resources from them, it basically discounts the price by 2 which early on means paying 2 gold to get a luxury, 1 happiness, 1 faith and 2 culture. At 2 faith any civ with decent synergy became a religious powerhouse
Here's the problem with this statement, it makes the bold assumption that you can always trade every excess luxury with an AI for a new unique luxury. In an actual game this ranges from 'quite possible' to 'not very likely' depending on map-size, maptype and number of AI in the game. If you're playing smaller maps with no extra added civs your number of possible tradingpartners shrinks quite a bit, playing continents cuts that number in half and other map-types might reduce it even more. On top of that, these are only possible tradingpartners, you're quite likely to lose one of them to either constantly being at war with you or just hating your guts enough to refuse trading. It's also quite possible that you lose out on a possible trade-partnet by them expanding into 'your' starting area and connecting your 'monopoly-resource'.
I've found that more often than not Festivals was the best pantheon. Every other game I played it was the pantheon I chose, regardless of civ or victory condition.
