Was the Austrian mystic, Rudolf Steiner, an uncorrupted source as a seer? Is his published work largely accurate and in divine alignment? Can we recommend him as an authority?

He is not a danger to your ideas or reputation. He was a genuine seeker and did his best to convey psychic impressions and information of many sorts to others. That was his life mission and goal and he comported himself well. That said, he was an intuitive only and subject to the same difficulties of understanding and conveyance of what he was seeing as other seers. So it is not out of order to bring him up, particularly as he has addressed the issue of what was coming in the future and serves as a starting point for a conversation from us, as you have captured. He was working long ago and from a more limited awareness of many things culturally that have continued to develop, as well as metaphysical knowledge, and particularly, a better understanding of the spirit realm and the divine realm and its mechanistic handiwork, as you are bringing forward. So yours is a better compendium for people wanting deep insight and valuable knowledge about such things.