I think she must have been something to do with the curse, since she had the other name and everything.
I guess it's just something that could have hypothetically happened. You know that whole theory that there's infinite alternate universes out there, where every possible scenario happened or something. I don't know, that's something for a philosophy student!
Rumple seems fine, from what I've seen. Trying to keep the other you from getting into too much trouble. Henry was switched, I think, but he's back. Emma is currently switched, she's really Princess Emma, raised in your original world. Graham seems fine, looking after the kids. Ruby, I think is alright.