What I appreciated most from MiTaP was his suggestion that ceremony was, at its best, spontaneous and heartfelt. I can't remember the actual quote, but there was one section where he recalled that singing some obscure song ( something about Greenland's icy waters ?) was the only possible way to complete some operation he was doing, though he could not give any sensible explanation as to why. I think that was a clue he was giving out about his real attitude - that the ceremony was about the state of the practitioner, not in itself intrinsically powerful.
Glad to hear from another fan of RAW. He was a fine human. Unencumbered by a need for certainty.
(Forgive my delayed response btw. I get sidetracked ).