Before biting the orthodontist's head off, it sounds to me like he recognized what you already knew. Overbite and spatial issues. As far as wanting to address things, perhaps that all it is since he wasn't her primary orthodontist. Did you have all her records sent to him?
I work in the medical field, I've been a patient, I know it's hard for a doctor to pick up where someone else left off. He may just be trying to get an overall picture of things as far as continuing her treatment and everyone being on the same page. It sounds like he wants to address things. Would you rather he didn't? I mean, you took your daughter there.
It doesn't sound to me like he's done anything out of line just yet.
You can get a second or even third opinion. But, I wouldn't freak out just yet until you talk to this ortho further. You don't even know what he meant by "addressing" things further means.
Just my opinion.