"If the totality of the universe is an emanation of the will of this Unknowable Spiritual Essence, then no constraints such as free will can be applied or apply to this Essence." If this Spiritual Essence is unknowable then there is obviously no way of knowing what it is or whether it is responsible for what we do understand. I don't understand the bit about constraints brought about by having free will as opposed to having no free will.
I understand humans having a spiritual dimension from a figurative point of view, but not in any other sense.
"To have free will is to be able to think, judge and reason and is subject to time. This Spiritual Essence is timeless and beyond such processes." If we can't observe this directly or work out observable linked consequences then this is only opinion (in my opinion).
"In our physical realm composition that leads to decomposition we see such actions roll out along a time line. Because we are embedded in time we have a modicum of free will as we travel a very short distance through time. Beyond time we are immortal and once immortal we have no free will." Unless we have evidence of this it is only opinion (in my opinion).