I have been asking for about a year to make changing doors and drawer boxes in the batch area possible. Maybe they are getting close or just need a few more votes.
This is one of the reasons I would rather post suggestions like this on the forum instead of putting it on the "form". I think suggestions get more weight if others indicate they would like the same things.
If it's painful to include the slab door/drawer front material I think it should be easy to copy the Adjust Cabinet Features, Change code from the Custom Layout Editor to the Batch Cabinet Editor. This is actually a better idea.
It is fine to post software improvements on the forum to "Rally the Troops" but be sure to send them in by Feedback in the software and encourage others to do so also. That is the way to get attention.