I read just over 60 pages of this material, and my opinion on it so far is that it is fear-based material, or misinformation at best.
It's not strictly contrary to the Ra material, but I wouldn't describe it as an "excellent fleshing out" of the Ra material. In order for it to be described that way, it would have to expand upon concepts presented in the Ra material, or reveal new information that was missing in the Ra material. I didn't discover either of those things in the portion that I read.
The story that it presents actually only begins to make a fragmented sort of sense when interpreted through the lens of the Ra material. Even if what is described with the grey and the interviewing and the book reading/English learning is all literally true, the information coming from that entity (which you could interchange for the term IS-BE in this material), Airl, if taken literally, is carefully designed to manufacture in the reader/listener a state of mind consisting of hopelessness about earth, negativity about the surrounding universe, and paranoia/judgement about other-selves of humanity. It precisely shuts off or "explains away" any areas in the worldview where light or hope may shine in, and very quickly and discreetly takes the focus off of what is good and positive about Gaia and humanity and the universe at large, and directs it towards control, subversion, hopelessness, and distraction.
Examining concepts such as the Domain in light of the Ra material, one could make the conclusion that it is a 4th and 5th density negatively oriented empire with their own agenda for planet earth. Concepts such as the quarrantine and the process of incarnation due to karma accrued after entering the quarrantine is presented in a very confused, distorted, and fear-based fashion with the "electric shock web" and that whole process they describe there. The essential truth of the quarrantine is not revealed.
Actually in what I read, nothing empowering or uplifting was shared by that entity. (Although I was inspired by the process of events, and seeing the Creator's magic in the lady's bonding with Airl, and the interaction of the entities) It seems like once Airl's craft got past quarrantine and accidentally crashed (must have been accidental if there were really nonviable bodies at the crash site), and Airl was taken into the base, a very valuable opportunity was seen by her and those who she was psychically linked to, to absorb information that was previously inaccessible (reading the books), and then to use her position of unquestionable authority when it comes to information about her and the universe in order to begin to paint a very dark and depressing mental picture for those involved who were both forced and willing to listen.
I don't know if what she said is all true, or partially true, or not true at all. It is notable that she chose one entity and one entity only to communicate with during her stay in the Roswell base, which is a method of gaining as much control as possible of the situation. It is also good to note while reading the story of cosmology that she presents, that beings who are polarized service to self will lie at every opportunity possible that benefits the self (something that unity100 pointed out). Another thing to note is that there was no mention of the Confederation or any positivity at all in her declaration of ultimate reality. I'm also considering that she may have been entirely truthful as far as she was allowed, and simply reflects the viewpoint of the Creation that is unique to her negatively oriented self and negatively oriented social memory complex. If this is true, and she was just telling the negative side of things, so to speak, then what she speaks of would of course reflect her and her social memory complex's focus.
And on top of all that, this information was being received by humanity, which is essentially a spiritual child. So in that light, it's expectable that whatever picture of reality that she is painting, with the Domain and Old Empire and all of that external stuff, is "simplified" to be understandable to a child, to one who has no ability to grasp spiritual or universal concepts, who has no previous awareness of life on a galactic, or larger, scale.
I did find the part where she said the dating of matter based on how fast other matter appears to break down is fundamentally in error, and that matter simply changes form, but is never destroyed and never breaks or wears down. There are a couple other little gems like that scattered throughout the portion I read.
Ashim, I would be interested in hearing how you have benefitted in your seeking from reading this material, or what parts have inspired you. And thank you for sharing!