First off, the devs need to continue to fix the various bugs (and pathing) in the game.
Secondly, I think the best way to fix the issue with team game ELOs at this point would be just to reset everyone to 1K ELO and get rid of all that extra ELO that built up over time before the earlier fix. yes this will cause some issues as people get sorted back to proper levels but overall it helps get rid of the extreme issues they have right now.
Thirdly - fix the alt F4 issue that we currently have (I know the devs are aware of the issue and currently trying to fix it).
Fourth - regional monk, king, sails, etc need updates.
now onto the Balance Changes.
as ever the Militia line needs some love.
all Militia line upgrades except for the Men at arms upgrade → Reduce research time by 10-15 seconds.
longsword and Supplies → Make these upgrades cheaper (both down to 100 food and 50 gold).
Steppe Lancer → Reduce the food cost of this unit down to 60 food, and reduce the cost of ESL upgrade to 500 food and 400 gold.
Steppe Lancer → reduce reload to 2.1
Cumans → SL, Scouts, and Cav Archers are produced 20% faster
Cumans → castle age unique tech nerfed to account for faster production baseline
Cumans → Elite Kipchak base damage increased by 1.
Sicilians → Gain Thumb Ring.
Sicilians → Houses also built 100% faster.
Burmese → I am open to suggestions on this civilization, but they desperately need something.
Koreans → War Wagon bonus damage vs buildings reduced to +2 (Normal only).
Koreans → Wood discount extended to siege.
Mayans → Reduce their archer discount to 10/15/20%.
Mayans → Increase cost of El Dorado to 900 food and 700 gold.
Incas → Team Bonus changed to include Mill upgrades researching faster as well.
Incas → Andean Sling becomes a civ bonus - New Castle Age Unique Tech gives Infantry +3 bonus damage vs buildings and Cavalry.
Portuguese → Do something about Feitoria - it is useless in most game modes, and a problem on Islands. open to suggestions on this one.
Burgundians - Flemish Revolution → cost reduced - now unlocks the ability to train Flemish Militia from barracks and TCs. can upgrade villagers to militia manually at the cost of 20 food and 25 gold each.
Saracens → Mameluke → Cost reduced by 10 gold.
Saracens → Madrasah → All units killed return 33% of gold. (Might adjust this is too strong).