I think Loki has a personal stake in resetting his on timeline...saving his mother and therefore Odin, also preventing Thanos from snapping his neck. This is why he is trying to take control of the TVA. Not saying that the power wouldn't go to his head. Also, am I the only one that doesn't think Sophia has the right "look" for the part of Variant/Enchantress? In my mind's eye I see someone closer to Cate Blanchet. She just doesn't seem sinister enough.