You forgot to add a cap on infinite zouave from New York age up from USA or at least a cost increase from each time the card is send, a cap to Holcan Javelinier from Mexico Maya Revolt and fix the bug/exploit that allows mexico to reach absurds numbers on villagers gather rate like 10 coin/sec, also i think chinaco should be specialized and not this anti everthing they are now with extra range then normal hussar and multiplier against them too, plus aoe charge ability and multiplier vs infantary, maybe a tech that makes then either a lancer unit with extra range vs infantary or a melee goon cav like camel rider but instead they stay heavy cav, but no extra range.
Also a rework to infinite trade cards to make them more viable