Galadriel has turned out to be a flawed character.
Not very goddess-like or wise, extremely serious, no sense of humor, bull-headed, a zealot.
I think one of the fan criticisms of her character writing- that she is too immature to be an ancient being- is on the mark. I was expecting a Galadriel that was more like the one in Fellowship of the Ring, but instead the character comes across as a young, troubled person.
I think the theory that Halbrand is Sauron is making some sense. Season 1 may be about the gang defeating Adar, and Sauron taking over his position. Next season will be about the forging of the Rings.