Range is definitely important. I can’t tell you about other schools, but as a Choate students, I can tell you that your daughter would be able to practice dancing all she wants here. Students can apply for the Arts Concentration Program, where their sport is replaced with their art and they spend a large amount of time working with instructors to improve their art. Not sure about the specifics: just something to keep in mind.
Let me also add that your daughter definitely would not feel inferior or left out in terms of her FA situation: I don’t even know who’s on FA in my grade, except for a few close friends.