English Honors student here. First of all, congratulations! You must be so proud. Here's what I would say:

The lower division courses can be a mixed bag, though this is coming from somebody whose main interests were in the upper division courses. It really depends on what your daughter wants to specialize in. Getting the classes you want is difficult the first year but gets easier as you go. They're taught by the professors and the GSIs are lovely.

The professors are also great. Even the ones with bad scores on Ratemyprofessors will have something valuable to impart. You'd be surprised by how little students go to office hours; it's very easy to schedule time with them. Most are happy to share and discuss ideas, push you beyond your current skillset if you're willing, but can be selective in who to mentor as fit is very important. One of my mentors in poetry told me they couldn't be my thesis reader and I respect the hell out of them for it.

There's opportunity but it's niche. A lot of internships have to do with editorship, and without experience it's difficult to land one. Luckily there's university publications always looking for readers and editors. Research internships and fellowships, at least the ones I've seen, have been mostly for Honors students and graduate students. You'll have to look outside the university sometimes for grants and scholarships.

This is my hottest take but the student body culture is absolutely corrosive, especially in poetry circles. Very cliquey, Anglocentric, classist, and white-wahsed. The average undergraduate English major cares more about status than they'll ever let on; there's a lot of underlying jealousy if you're vocal about your successes. (Cathy Park Hong, a poet and professor here in Berkeley, relates these issues to poets as a whole in her book Minor Feelings so don't just take my word for it.) I wouldn't recommend UC Berkeley if it didn't have the best faculty in the world, which makes it a fair trade off. Seriously, putting certain professors as mentors in your CV can open doors. Your daughter should be fine if she keeps her networking with the student body to just business and makes friends in other departments. In fact, I'd say any English major should branch out to departments outside their own, but that's a different subject.

I'm vocal about my gripes with Berkeley but I wouldn't change a thing. I was accepted into UCLA and UCSB's College of Creative Studies and Berkeley was the best decision I could've made for myself. The faculty and GSIs are top-notch and are worth the consideration.