Hi Charhope!
It's great that both you and your daughter are considering liberal arts colleges. Quite frankly, I find many Asian American students and their parents are unaware of how great these places can be.
As an Asian American myself and a sophomore here, I do have some things to say

! First of all, it is true, Bates is trying to diversify the campus more...and that is for a reason, there aren't many minorities here. I was very worried about this myself---but I pushed myself and thought, "Well, you know what? This is a good challenge for me. So by the time I'm out of Bates, i'll be so used to being comfortable regardless of my heritage."
I was right. I am perfectly happy here, and though it took me a while to get used to it, it wasn't because racism is rampant here or the people are snobby. It's purely because switching from a very diverse high school to a place like Bates was different. The people here are incredibly sweet, intelligent, open, laid-back. There are also many international students here (including Asians) and I spend plenty of time with them.
I say, that if your daughter is willing to step out into the world with a positive attitude and challenge herself, she should definitely consider Bates. Final word: Bates isn't terribly diverse, but that isn't a detriment if you're open-minded. Hope this helped!