I am basically positive she isn't dead. I don't think they would get rid of more then one main character in a season's time. It would basically be economic/ rating suicide on their part.

I actually think it is kind of a cool power. I think it will probably take some time to get used to. She is probably knocked out because reviving someone takes a lot of energy. I mean she basically has the power of healing, but i think healing someone from death would basically drain you, you know what i mean?