Obviously can be improved greatly. It's the first time I am actually finishing my America game in RFC. Philadelphia-Boston tandem proves to be a better choice than Washington-New York. Less overlaps with Chicago and each other. I did wait for the flip on Turn 3, I got my workers, but no troops when England declared on me. So, I guess, there is nothing perfect under the sun, one of the rare cases when AI found Philadelphia, but no troops.
Without extra troops and England focusing colonization efforts only on American continent the war proved to be very long (I got 3 Great Generals with England) and very unlucky. My Combat 3 Galleon died with 91% winning odds against the English Caravel. Warlord Cannon died despite all the promotions. Because I never reload and don't even keep autosaves this was a very serious blow. The Spain should of been next, but she collapsed. My vassal Aztecs collapsed too, just before discovering a tech for me, which was very strange, as their stability sign was never showing "Collapsing" (always flat!) and I was treating them really nice.
After all these wars I finally got my UN at 1906. Unfortunately, started to chase the Oil too late. Instead of Gulf War, conquered and culture bombed Chechen Itza, took the Oil from Portugal/Brazil, founded cities in Nigeria, Brunei, Livia's desert (Egypt was my vassal), Venezuela and was about to get the Oil in Algeria from Carthage, when I discovered that I already have 10 Oils

. Too bad for poor Carthage, which had to be killed in order to satisfy American greed.
Strangely, France and Arabia never respawned. Another strange thing was the absence of Temple of Kukulkan in Chechen Itza

. I mean Gunpowder cancels the effect of the Temple, but the building itself shall be there, right?