Keep in mind Edwards' essay "An alternative view of states" at Integral World, Part 1 and Part 2. For example this from part 1:
"The current integral theory model of states is committing a category error, the Pre-trans Fallacy #2 to be precise, when it proposes that individuals access transpersonal states and/or realms when they enter into the natural states of dream sleep and deep sleep. This error has important implications for the whole of the Integral theory of states.
"How on earth...could Ken...the great surveyor of this previously unknown territory of the PTF errors, lose sight of this core landmark on the AQAL map in his treatment of states? Well, I have a few suggestions. One is his unswerving reliance on some aspects of the pre-modern Vedantic view of states."
Edwards notes near the end of Part I that there is indeed a "given" in the Atman is Brahman principle, "that God is present ...in all his fullness." But this is a metaphysical given versus the kind of given I'm talking about above. While I agree with him that this given is not the same from a more developed perspective, that this state is not realized until later, this metaphysical remnant remains and will be expressed more in Part II.
I appreciate Edwards' caution beginning Part II that pre-modern spiritual traditions were not aware of stages leading to egoic identity and hence made many pre-trans conflations. Even Vedanta and (Vedanta influenced) Vajrayana, while avoiding some of these PTFs, nonetheless is a "tangled mixture" still clinging to other conflations that Wilber retains. Edwards' worthy goal then is to differentiate between the pre-trans elements within these traditions, focusing on Vedanta.
Edwards notes the PTF notion of a "return" to a primordial, nondual unity, which of course is only after a "fall" from grace, said fall caused by the dual (Devil) Ego. Hence we often find retro-romantic notions of returning to a pristine origin before the fall. Even Edwards' presentation of the "true" Maharshi, who apparently does not equate deep sleep with the causal realm, nevertheless maintains the metaphysical idea that there is a "true" causal realm that must overcome the "illusion" of maya. Ironically the Devil is quite tricky to be hiding in the midst of such supposed nonduality.
Not surprisingly Wilber comes to our rescue in asserting that it is the self-system (aka ego) that integrates all of the various aspects of psyche. (See for example his "outline of an integral psychology," particularly page 4.) And that a strong, healthy ego is prerequisite to take such a journey into transpersonal nonduality, lest the trip be into psychotic dissociation. But again, Wilber is a mixed bag here, often framing such transpersonal integration withing traditional views and their own confusions, particularly with reference to states.
Now here's an interesting section from Part II, quoting Osborne on Maharshi:
"In fact, one name for the true state of realised being is the Fourth State existing eternally behind the three states of waking, dream and deep sleep. It is compared with the state of deep sleep since, like this it is formless and non-dual; however, as the above quotation shows, it is far from being the same. In the Fourth State the ego emerges in Consciousness, as in sleep it does in unconsciousness."
Aside from the metaphysical words like "true" and "eternal" it is significant in that the Fourth State (was that Virginia in the US?) "the ego emerges in consciousness." The ego, hmmm. Edwards' diagram following this quote are illuminating in showing the pre-personal states of deep sleep, dreaming, rational ego, and then transpersonal "structures of identity" which integrates all of them.
And yet what does the integrating? What gets us past the ego? I.e., could it be done prior to the development of an ego? Can we ever go back to a state or stage that was before the ego once it emerges? Obviously we can enter nondual states of awareness where the ego is temporarily suspended, but is it the same state as before the ego came along?
In section on the "ever present" in Part II Edwards acknowledges that it is so from an absolute perspective as an inherent, given potential but it takes development in the relative realm to become conscious of and integrate it. I agree with this but the "given" is not an absolute potential but rather a much more relative, human one based on our embodiment. Edwards is right about Wilber's (and Vedanta's) conflation of dreaming and deep sleep with the subtle and causal states (and bodies) but he still adheres to the traditional, metaphysical interpretation of them.
His section on studies of meditators indeed comes to the correct conclusion that they become conscious of and integrate dreaming and deep sleep states. But we can interpret those prior states as subtle and causal, even transrational, in a postmetaphysical way sans an ultimate or absolute realm.