Instead of putting everything in the Issue Scheme, we have put most fields in the Layout Info Scheme.
If you view Layout Book in navigator and right click the top of the folder (Book Settings) you can set up the Layout Info Scheme at the bottom.
This allows you to setup those scheme fields for each individual layout, meaning if you forgot to add a layout and already finished publishing an issue, you can still fill out any info for that layout and that can be added to Index of the Layouts.
Of course, you don't have to set things up one layout at a time. Our workflow is to set up the Issue (add all layouts), then filter the Layout Book by 'current issue', select all the layouts and then setup the fields.
Erwin Edel, Project Lead, Leloup Architectenwww.leloup.nl
ArchiCAD 9-26NED FULL
Windows 10 Pro
Adobe Design Premium CS5