Dear Bart,
I know that the Brahma Samhita with purports by Bhaktisiddhanta Saraswati and Bhaktivinode Thakur are pretty detailed with regards to who we are in identity and how free will is arranged. Hari has 3 classifications of Shakti. Antaranga, Tatastha, and Bahiranga. We are little sparks of the same of which Hari is (sat, cit, ananda)(but from the Tatastha Shakti), due to this we are "little" isvaras, yet we have a flaw (due to us being "little" Isvaras of the Tatastha Shakti) which allows us to become influenced by not just YogaMaya, but MahaMaya as well. The Antaranga Shakti and Shaktiman are never under the influence of Mahamaya, but can be of YogaMaya. Their drawings from the verses are pretty deep. I think you'd appreciate what is said there regarding the jivatma, vibhinamsa, etc...
With regards to what Arjun saw on the battlefield while witnessing Vishvarup, it seems to me that he was pretty descriptive and detailed with what he saw.
With regards,