Good luck on visiting. As you said, there are a lot of other great universities out there that could be a better fit both academically and culturally for your daughter. Only she and you would know. Glad you are visiting both Northwestern and UChicago. That would give you a good sense on what options are out there.
Many schools that are known to be great at Astronomy/Physics, are kinda quirky, be it MIT, Caltech, UChicago, etc. So maybe after your visits, you would know if these quirks from these quirky schools are deal breakers for you.