Hello, stinkbug,
I suggest that your daughter does not make the decision to leave until after she finishes some or all of her yuk year. Being a plebe shows what being at the bottom of the pile is like, which isn't the best place to be. Once your cadet becomes a yuk, he/she will be allowed more privileges and things seem to lighten up.
I strongly suggest that your daughter joins a womens' club team for her sport. This is the one area that plebes are allowed to socialize with upperclassmen. In my daughter's case, she and the other plebes on her team were treated like little sisters and given the mentoring and support that a plebe needs. Being on a traveling club sport team also gives the plebe the opportunity to get off post every few weekends and feel part of the real world for a short period of time. A few other benefits are that my daughter was able to run off a lot of the stress that builds up, and being surrounded by men all day, it gives the gals a chance to just hang out with other girls.
Good luck to your daughter.