Scots Grey
Despite how much I’d love to add this unit as another purely unique unit for the British, I think that it should be added as part of a new Stuart Royal House minor civ along with my previously mentioned Royal Highlander.
I think that the Scots Grey should act similarly to the German civ’s Uhlan with a massive attack but less hit points but be generally better be. Maybe, they might also have an attack multiplier against artiliary and light infantry and/or a siege/range resist. This combined with Royal Highlanders should give the new Stuart Royal House a military feel similar to the major British civ that relies heavily on a Hussar + Musketeer army composition. This said, I’d introduce a home city card to the British called “Act of Union” which would allow the training and upgrading of both Scots Greys and Royal Highlanders in all military buildings.
The new House of Stuart should only be available on maps within the British Isles (i.e. England, Scotland and Ireland - maybe even Wales in the future)