I'm wondering if the other person Elspeth sees when she tries to 'talk' to herself is the manifestation of her witchcraft, which simply wants to tell the truth. If so, she should be able to use that to start doubting the way Chelsea has tweaked her to evaluate other people much quicker than if she were to begin re-evaluating her memories; memories that she may not trust with her new values. She has no reason not to trust her witchcraft however, so if she asks it about herself and what she thought of others before being Chelsea'd, she may recover very quickly. Once she's done this, she may also be able to help the Quileutes recover their original values. If not, then at least she can order Jacob around.