Caleb, I also agree with your analysis. However I was somewhat disappointed, in that I found that virtually all of the characters, with the exception of Nakht, where lacking in subtlety: each had a pretty stark view of Akhenaten and his story, and it is putting them together that gives us a rounder picture, but I found the single dimension of each perspective unconvincing.
I could not avoid comparing this treatment of "truth" to Pirandello's, which to me is vastly more nuanced than in
Akhenathen - dweller in truth - but I know I am impossibly biased