I think this terrain fits if it is used exclusively, with cardboard standees in the same sepia hand drawn style, to create small, focused scenarios that have a diorama quality to them. I don't think it would looks good mixed with normally painted miniatures and other terrain pieces.
Somehow it reminds me of that great terrain table I saw here long ago that looked like a 1920s German Expressionist cinema movie, I wish I could find the thread.