When Livia describes Minfilia as the Scion's High Priestess she's . . . pretty accurate? Minfilia isn't the head of the Scions because of any leadership skills, she's there because she's the Antecedent, the first person known to have the Echo, which gives her a semi-holy status. Unfortunately Hydaelyn is terrible at providing any sort of practical advice so when Alphinaud rolls up to seize control she doesn't really try to stop him, she knows this isn't her strong point.

. . . My bigger issue with the Scions is why none of the other Echo holders, like Arenvald, ever help out with this Primal thing.