There was only one major problem...
I spent some time last week reading the converted Necropolis, and I have the original.
Perhaps the one biggest snafu that people will likely catch as they read it is this...you have a major discrepancy between the aligments of the Khemetic deities listed in the statues and throughout the main text, and the alignments given to the diety descriptions in the back.
I suspect it was hard to always convert the concepts of the 5 religious ethoi in Mythus to the double-axis alignment system in d20 rules. But when you have statements that the Lawful Good deities do not interviene in the Underworld of Osiris because of the conflict with Ra, and Ra in the back is listed as Neutral Good--you have to admit, it does get confusing.
Outside of that, and perhaps explaining the concept of Seelie, Unseelie, and especially "Borderer" so people understand the terms seperating those sphinxes, I think it was a good job.