Hobie: The answers to your questions are more complex than the "either or" that you seem to suggest.
* Ellen white clearly denied that God had dictated her written material, and she stated that her writings were in her chosen words and manner of expression. Surely, I do not have to give you a citation for that.
* Her writings were often specific to an individual and not intended to apply to everyone. She told one woman that she looked good in a red dress and should have such in her closet. It would be foolish to say that such would apply to every woman. In other cases, she gave opposite advice to different people.
The bottom line is that after the death of Ellen White, human SDA leaders began to elevate the authority of her writings above what she would have agreed with when she was alive.
In many ways EGW was a gift from God to this developing denomination. We would not be what we are today in publishing, medical care, missions and education if it had not been for the guidance that she gave us. But, she was not given to us to determine our theology. She was not given to us to establish our doctrinal understandings. She was not given to us to establish what the Bile taught.
In her personal life, over a period of years, she changed her understandings of the Biblical teachings in a number of areas. In short, she was an imperfect human.