Your first question: "Wouldn't the doctrine of Adam and Eve's being in the physical image of God make God a morphadite?" My understanding of this statement means that He created man and woman in the image of a person, not a horse or a cow or some other animal, but in the same image as He himself is. He said, "Let us make man", so apparently He was talking to the Savior at that time; they may not look exactly alike but they are personages and so in the image of the personages who created Adam and Eve, God made them. I think that is simple and plain--it is the image of a person.