I also think she doesn't really want to be saved since it was her choice(kinda). When I say he's a alpha I don't say for his ability to lead, it's more that the witch said the alpha is stronger than normal werewolves and he's wolf just seems stronger to me. But I also think that all of Logans aggression comes from some kind of insecurity since whenever his facade breaks is when he really makes progress and opens to you, like you said. Bernard sure is fit to being an alpha, but I would find it interesting for Logan to be one, and need to find a more reasonable way to lead without the aggression.