Compared to previous Gazetteers, this felt somewhat... underdone. (As an aside, S seemed to be a bit angsty here. Did really affect her that much, or is this White Wolf's influence bleeding through?)
Nova Vaasa - Probably the best-done in the book, but aside from the false history and geography, I didn't get any strong sense of "newly revealed material." Of course, Nova Vaasa was one of the better-detailed domains anyway, so that's likely part of it. Was hoping for some signififcant newer developments between Malken and Hiregaard, at least.
Tepest - The false history was especially good here, in my opinion. The new developments with the Inquisition are especially realistic-feeling, and the details on Wyan made him a much more empathetic character.
Keening - This was the domain that benefited the most from additional detail. Love the concept of undead fey clustered around a mad queen.
The Shadow Rift - Ironically, this chapter was TOO detailed for what should have been vague, contradictory second-hand accounts. I liked the detail- but it broke character, IMHO, to have S reveal such authoritative data. It woulda been better if it'd been lots of vagary with sidebars featuring the truth. That said, the enhanced details were excellent, especially on the two Courts. The statted Gwydion was appropriately formidable- he could give Cthulhu trouble.