"I don't think we in the west can be too superior about this coming as we do from a tradition that has its roots in liver divination."
I agree.
And the liver is a Jupiter-Luna dimension.
However, the West functions largely and primarily under a solar construct, which is one geared towards manifesting things, externalizing and exposing to light of day for it to be considered true, real and of value.
The other side of this, eg. gestation, because it goes largely unseen is no less real.
The old traditions dealt with 3 sides of the coin in maintaining a balance.
Which one appeals I believe depends a lot on culture, culture = nature = latitude upon earth, which finds a parallel alignment within the celestial sphere.
No matter how global things become, local latitude is of prime significance, especially applicable for those of a scientific bent seeking to conduct experiments within clearly defined parameters.
"given the repetition & the "sixness" factor & properties of six itself,"
"one could argue the essence of the I Ching is its eight trigrams."
The ancient Babylonians had the 'Lunar Six' for predicting phenomena on the horizon (the horizon view), the lunar six being characteristic time intervals between Moon rise/set and Sun rise/set in the days around conjunction and opposition, collected over 60 consecutive months.
8 is also the 8 phases of the Moon.
The Chinese invented the compass and its eight points were synonymous with the trigrams.
I have not done enough work with the IChing, however if I remember rightly it's said the circular arrangement of the trigrams were found by studying the scales of a tortoise back.
A tortoise is representative of the bounds of nature's time, primarily Moon, the nocturnal dimension.
The Moon seems to have lost a certain significance in some modern astrological streams, it's still brought forward in horary tradition and was primary to ancient calendars.
Broken and unbroken - corporeal and incorporeal?
Inventing compasses involves an understanding of earth's magnetics, gravity etc upon which both Sun & Moon exert an influence, as does anything encircling earth or in range of the ecliptic. If I recall rightly, they also invented spaghetti, gunpowder and waged a war against importation and trafficking of drugs very early in the peace.
For the most part, much of western astrology today takes its messages from the planets (the intermediary bodies) and the 12-fold division starting with the 0 degree point of the ecliptic, an entrance to the earth plane, materialization.
Stars from which alignments were initially drawn are rarely factored in (although that's re-remerging) ... the alignments changing in cross-cultural transmission, and that from which the nature of things were initially divined was lost sight of.
In this respect, astrology and all that it's utilized might be thought to have become somewhat land-locked in places as instead of commencing with the unspoken name (eg. the all creative force/source) which resides both beyond and infuses the celestial sphere, containing or giving birth to all within it down to earth, it commences with the earth point.
But if the divine is considered to be the sanctity of the whole, it hasn't lost its universal connection, just perhaps something of its origins due to transmission.
As alignments drift and reduce, so do perceived connections with the divine via customs and various climes.
Free will is an interesting concept ... however freedom is directly related to responsibility. If society is reliant upon provision of life's basic necessities, such as water, by a third party, then freedom is contingent upon commercial supply. Commerce is also an outreach of one's clime. We have a choice in that we may choose not to drink, but that choice also has its ramifications for which we are responsible.
Divination as relates to the answering of a question in astrology I see as reliant upon how we perceive the order of nature's time and all it's representatives in relation to life upon earth at a particular locale ... the better the order is understood the more clear becomes that being divined for that particular person at that location.
We may not consciously register all the things we're actually playing a participatory role in while focusing on technique ... however, I think that's part of the purpose of technique, the discipline of focus which stills the mind from other distractions and opens up one's receptivity.
Communing with the divine involves some sort of grounding ... can help to avert motion sickness in traversing the high seas.