The irony is that the stuff that needs to get fixed has already been noted on the .pdf by the time you get the advance reader copy, so it feels like the one flaw on page 97 that you wanted them to change has been there FOREVER, but in fact, it went to the printer before you saw the .pdf, and has probably already been fixed for the final run.
Also, dude, long lead time. This book doesn't come out until February.
Anyway, back to work on book 3...
ETA: Weird as it may sound, the inclusion of the page of Empire of Feathers makes me just stupidly happy. We had to simplify the colors, but it's the same line-art and text. Heh heh heh.