What about the cavalry?
I know you made it cheaper so the AI will want to buy it , but some factions didn't use so much cavalry historically. You should make some kind of cavalry like the West-Barbarian one more expensive and the Greek or Dacian one the same price and the easterners like Parthia and Armenia should have cheaper cavalry. (same for Nomads).
Also, do you plan adding more swap factions, and if not will you add 0-turn for Capua and the other 2 which have 1-turn default and viceversa for the 0-turn ones?