I had a little idea the other day that I think might fit this mod. What if each pantheon received an extra bonus tied to a certain ancient/classical wonder?
For instance:
Goddess of the Hunt adds +5

Faith to the
Temple of Artemis.
or
Goddess of the Hunt gives a -15%

Production cost discount for the
Temple of Artemis.
or
Building the
Temple of Artemis in a city with the
Goddess of the Hunt Pantheon grants a +100

Faith boost.
I think it can make picking a new pantheon a little more interesting, you might consider picking a pantheon that you wouldn't pick normally if you have a certain Wonder or are planning to build it soon. I'm not sure how balanced it could be, or if there are enough Wonders to tie to each Pantheon, some other combos I can think of the top of my head are:
Ancestor Worship - Pyramids
God-King - Statue of Zeus
Goddess of Wisdom - Parthenon
God of the Stars and Sky - Stonehenge
God of the Sea - Great Lighthouse
God of Commerce - Colossus
God of the Sun - Oracle
God of War - Terracota Army
Goddess of Protection - Great Wall