I agree that the opening act worked pretty well but there was that moment when Baylan and Shin show up a the henge where I was thinking, “Wait, where’s Morgan? Didn’t they just pick her up?” But oh well, it ended up working out okay.
I had this same thought initially, but it’s explained away pretty quickly in a later scene where Morgan arrives in her own ship. Clearly she needed to make a pit stop to gather all of her witch belongings.