In the past, I've been the technical editor for all of the Linux- and UNIX-related titles at Wiley (at the request of other authors like Richard Blum and Christine Bresnahan since other Linux authors often provide for the most valuable technical reviews).
However, this year I haven't heard a peep that way, so I don't know what is happening at Wiley - but it's possible that cost-saving shortcuts are taking place (e.g., less content editing, consolidating authors).
What I can say is that if I were tech editing the the new title, I would have noted the absence of Objective 4.5, and recommended content for inclusion at certain places