I would agree with the original thinking on the map book, adventure maps should stay with the products.
However, do I assume correctly that the map book would have the Feldric's Redoubt city map for example? Something from the adventure material, but not critical to the adventure. Edit, doh just reread your post and saw this would be included. Cool.
Guess I'm saying the map book with world maps and town/city maps would be great, leaving the out actual smaller adventure maps.