Shemeska
Adventurer
I admit curiosity as to how Shemeska is going to respond to this book. Nobody can say they know Planescape if they don't get flashbacks from reading it. There's even someone with the nickname "Basher," which almost has to be a wink from one of the writers.
I haven't looked at it yet. I've been far too busy of late to pay much attention to much online, and I'm working on a planar project of my own at the moment (Paizo's BotD III, the NE fiend/daemon book).
That said, I respect your opinion on such things more than most, so I'll take a look at it and let you know in a week or so what my impression was. Still, most of the interest in this thread has been largely about crunchy rules bits, which isn't my thing, and I've heard that they really changed the Keepers from their 2e/3e origins (where I wrote their Dragon ecology) so I might be a bit biased going into it. But I'll take a look and give you an honest take on it.