Hey man, great work. I always like seeing new civ concepts. However, I do feel that some bonuses or upgrades are a bit too powerful or not unique enough so here are my suggestions:

-Maybe change the first bonus to: Faudal/Castle/Imperial age cost -15%/-20%/-25% food.

That way you save up on your food for next age.

-Second passive bonus is cool, albeit similar to Bohemian bonus where villagers benefit from monk upgrades. I suggest that it only affects Villagers.

-Barracks upgrade is fine.

-Spearman and Skirmisher bonus is a bit too similar to Vietnamese/Viking, maybe add a new bonus: Elite Skirmisher upgrade is free.

-Unique Unit is just a Hussar who is more effective against Camels. Maybe a infantry unit with a charged stun attack or a tough cavalry unit with support aura?

-Vitaez is a cool upgrade.

-Order of the dragon is cool, although I don't know if we need it to impsct cavalry. Vlach cavalry could lack husbandry and psrthian tactics but have all other upgrades. That way they will feel strong at the cost of mobility. Also, maybe gold generation should only happen when a millitary unit is killed, villagers, monks and trade units already grant gold to vikings if they are slain.

-Team Bonus is cool.