Regina came off as not just evil, but either insane or a bit stupid in this one-- thinking that the people will love her despite her mass murders, just as soon as Snow is dead.
The magic-nullifier is an interesting twist. I can't wait to see how they pulled that off. Or what they're real goal is.
Don't really like the idea of a scientific magic-nullifier. It kind of means magic stops being unknown if you have a scientific way to block it.
It's kind of like giving magic the midichlorian "force" treatment.