As to how I would change America... Well, I don't think they're in much need of buffing, but if I'd change something, it would be the UA. Giving it an extra feature to keep in theme with the "land grab" aspect of it, I'd probably buff their
of Settlers, and do as others have suggested and make it so the production of Settlers doesn't stop the growth of their cities. Or give them a discount to the
price of purchasing Settlers and Workers, in keeping with the theme of the UA that "money matters". Or give their Settlers, and perhaps Workers, a bonus to
, and/or the ability to ignore movement penalties from difficult terrain, like the Scout. Or perhaps just do the simplest change, and make it so their UA also reduces the
cost of acquiring new tiles. Probably not by as much, though, like make it so the cost of acquiring new tiles by
is reduced by just 25%.