Don't expect the doctor to call you back in any of these practices. The nurse calling you back was actually pretty good - it wasn't one of the folks in the office. The reason is that the doctors are pretty booked up, and they would rather talk about things like this in your regularly scheduled appointments. I do know that it is normal for them to schedule a C-section even when they intend to try for a VBAC...
I didn't dislike the docs in my practice - I only met 2 of the others, outside of my OB. I loved him, and he came in especially to deliver my first because I had complete bedrest with him from 24 weeks on. But with my second, he had been up all night the night before, so I wasn't destined to have him deliver me again.
Now here's the thing. Even if I had met all of the doctors, with my second child, it wouldn't have mattered. It was the ONE weekend of the month that another practice subbed for them. I had a doctor who I had never met, with a practice I'd never heard of, and I only saw him TWICE throughout my entire labor. The second time I saw him was when he delivered my baby. I tell you this because it could be that you get someone you don't know ANYWAY. But worse for me was that he didn't have a bit of incentive to go out of his way for me because I wasn't part of his practice. A doctor in my own practice would have.
This doc, when he came in to meet me, reminded me of how long I had been laboring and told me that if it went on much longer, he'd just do a C-section. I told him that I didn't want a C-section just because I had been there since morning. I wanted to know why I was still laboring. He left and didn't come back until after my NURSE had turned the baby. (He was face-up and STUCK and it was the nurse who figured it out. Bless her.)
If it had been any other weekend, I am sure another doctor in my practice would have been more interested and willing to use his head more than this guy who delivered me. They don't want to upset the doctors they share an office with. It's perfectly fine for you to discuss vaginal vs C-section and birth plans with your practice doctors.
I'm not saying that you shouldn't change practices, but you may find the same thing with the new practice. Incidentally, I told my doctor exactly how I felt about this guy. He appreciated knowing.