TEAM Customs Union (Germans)
When the trader passes a trade route owned by your team, all allies (including yourself) receive 33% of the income.
Crystal Palace (British)
Ship 1 Factory Wagon; Factories increase the work rate of nearby buildings by +20%. (replace one regular Factory card)
HMS Victory (British)
Ship 1 Battleship; Battleships deal +25% damage within 20 range.
(British is the only one that lacks a unique Battleship improvement now).
Ship 10 Kiheitai (skirmisher equivalent with promotion); Kiheitai can be trained from Castles.
Scorched Earth Tactics (Russians)
Blockhouses can be sold for 33% of their original cost; defensive buildings (excluding Walls) decrease the speed of nearby enemy units by -20%.
INF Beylik Army (Ottomans)
Similar to “Circle Army” of Germans, ship a different unit in the following order:
Berber Camel Rider
Grant veteran upgrades
Meiji Restoration (Japanese)
Rework of the consulate option.
Remove the Isolation option, add the following units and techs:
Units (can all be trained separately, like the Isolation units):
Kiheitai: skirmisher equivalent with promotion
Shishi: spy with charged ranged attack
Battotai: fast melee unit with a charged charge attack (similar to Samurai, but higher speed and lower hp)
Counter Infantry Rifling: the same tech, but costs export
Silk Manufactory: ship a Factory; -15% gather rate from natural resources (including Shrines)
Taisei Hokan: consulate units cost regular resources instead of export; exchange all exports to food/wood/coin (amount for each = current exports * 1.1/3)
The Lord Protector (British)
Age 3 politician; replaces the Mercenary Contractor.
Enable Harquebusiers at Taverns. Veteran unit upgrades -50% cost.
The Industrialist (British/French/Germans)
Age 4 politician
Factories -50% construction time; grant all Factory upgrades for free (except Mass Production).
BTW, the numbers are all arbitrary so they need to be adjusted by their actual values.
Also, because I’m not familiar with the history of every civ in the game, this list is very “biased”. So please feel free to propose yours.