I agree that maps (both player and DM versions) are the biggest missing piece. The Roll20 versions solve that problem, but only for those on Roll20 (and we have to wait as they are produced). Hopefully a map repository with high-res player and DM-facing maps will be a part of the new Zeitgeist project, either in an online repository or for sale or as a Kickstarter bonus.
I just took a first look at the maps and most are high res version usable for VTT. I don't have photoshop or another program on my laptop to open the PSD-files, but the name implies they have the layers. This would make it a lot easier to adjust the Flint map to Passage in Eberron. Thank you for sharing these maps.
As a GM that is beginning prep for running this AP in Pathfinder, I love the repository of maps that you shared. Will need to do a little work to make them work for Roll20, but it is work I would have needed to do anyways. I'm still going to take a look at the Roll20 stuff that has been made for available to see if it will help me as well.