Georgia: "Strength In Unity" gives access to the Golden Age War CB each time Georgia in a golden age, can faith-buy all Walls outright (half cost if Suzerain of Valetta). Tamar's ability grants her +50% Faith each time another Civ declares war on her, and for every war she declares during a Golden Age, lasting for 10 turns after the War Declaration.
England: "Workshop of the world" grants +1 Production from internal trade routes, scaling with each Industrial Zone building present in the receiving city. (in addition to the other bonuses). Victoria gains "Royal Navy Dockyards do not count towards the city's disctrict limit." in addition to the rest of her abilities.
The rest can stay as is tbh. Norway is better as of GS, Mali and Canada are more viable now that lumber mills, IZs and Quarries have been buffed. Haven't played around with modified Dharma instead but extra amenities is never bad. It's really just is Georgia and England who need buffs.
Also, I haven't encountered it myself since the latest patch, but I hope your allies can no longer attack your CS vassals. (and STOP attacking once you realign with them). If this hasn't been fixed, plz add that too =)