My Mudder found so many people like herself at Mudd that it felt like a bigger social group than it was. Plus she made friends at the other 5Cs. She misses her Mudd cohort so much now that she is in grad school in another part of the country! They are really a tight knit group. It is challenging academically, but very cooperative and with a lot of academic support from peers, older students, and profs. My kid also got amazing mentoring from profs, too.
The average GPA at Mudd is around 3.3 at graduation. My kid wasn’t very well prepared going in (less advanced science and math than most of her peers), and never slipped below a 2.75. Your kid will work hard, but if she likes it, I’d definitely let her go.