Thank you for all of your input!

efrem - she's not tall at all, so E+ isn't a life or death necessity. I would assume that Y would be the norm, in this climate and since she's just starting out, but who knows. Thanks for mentioning BD - that's an interesting idea into which to look!

beckoa - she'll be based in NYC. I don't know where the majority of the travel will be; if it ends up being a lot of west coast, AS seems to be a pretty attractive program for sure!

MikefromTokyo - thanks! As I have never flown much AA at all in my life, why would you say it's the best FF program overall? I'm curious...