I thought of some nerfs that would fix the new civs

Burgundy

1. Coustilliers charge attack is 15 (18). Another option is 9(10) but decrease recharge time. I would love if the charge could be given a different bonus class and monk and pikes (and some cav counters) have resistance to that
2. Cavalier and one age behind upgrades take twice/thrice the timebto research. This will keep the techs viable after a certain amount of investment has been done for the current age.
3. Food to gold conversion is 40% or 50%, not 100%

Sicily

1. Bonus absorption decreased to 15%
2. First infantry armour free/ Stone mining free
3. Villagers create donjons faster than serjeants
4. Castle, town centers created 40% faster
5. Scutage gives 10 gold per unit
6. Crusade generates sejeants at the speed of 3s each.
7. Serjeants created 18s from castle, 25s from donjon for non elite
8. Garrisoned serjeants shoot arrows from donjons