Nope, Disney's America should definately not be put into WDW. I mean, 2 lands and a park, that's just two much, maybe if it was just the pavillion at Epcot, but with Liberty Square, there should definately be no Disney's America in WDW.
It would be okay in Disneyland, aside from the fact that DCA is almost an exact replica of Disney's America, minus Paradise Pier and on a tighter budget.
Virginia is the perfect place, make it a nice, comfortable place, and never, I say NEVER add another park there. Just the one. It would be amazing, and would compete with Busch Gardens and Williamsburg.