I see your point as each one sounds like a main theme. But there is a lot going on in the background that none of us are aware of. I'm sure they've got it handled.
Especially since in the FAQ they talk about fiddle tunes. I'm guessing this is where a lot of the ingame music will go.
Aye, I'm thinking that too, and about the FAQ saying they'll use actual civil war music.
As far as main menu music ideas go, I have a personal opinion about it, and that's that I think, rather than a "suspense and drama with a hint of desperate heroes" soundtrack, it would be more fitting and novel(and rally up and excite folks just as effectively) if it were... how to find the right words; big yet march-like,
American with a hint of traditional sound and a sense of, as I would put it, "that southern giddy hurrah!" feeling(I'm sure Yankees have something similar to that feeling; we are the same country, after all). Maby even something I could sit at the title screen and just hum along with spirit! :O