Thanks Astraea,
In his Forward he says that Astrology is not just a device for dealing with human potential but is a 'language' that gives insignt into all aspects of the workings of the world, a world in which ourselves and our consciousnesses are integral parts.. He says of mysticism 'it is the understanding that beneath the apparent diversity of the universe and despite the seming alienation of all beings from each other and nature, it is all One. He uses the notion that, for example Saturn can signify not just an aspect of the human ego but also anything old, rejected, solid, lacking in glamour, bones, teeth, rocks, etc. to claim that everying bears the signature of Astrological symbolism and therefore eveything is part of the One.
At this stage he does not appear to have rejected the use of the outer planets, or Chiron (which he says is 'obviously of Astrological significance') but he does seem to seriously question modern symbolism as being muddy and ill thought out.
From your account of his lecture he seems to have fully returned to basics. I think that is all very well, and I can see in myself a similar 'voyage' but once the basics are clear in mind then is the time for venturing forth in a reasonably new direction.
That being said our ignorance of early Astrology is (or rather was) so huge that establishing those basics is perhaps the job of a lifetime. Rob Hand has certainly enabled us to learn more about the early Astrologers than most other Astrologers. It's because of him, in that sense, that I'm reading Al-Biruni and Dorotheus, rather than Dane Rudhyar. Again that is not to say Rudhyar is irrelevant but to say that in order to understand the present, we must first understand the past.