Here is an interesting recent article, I've thought you could find it interesting as well. It has really no new info as is, but still can be a good summary of what we already have. Trade and Currency in the Mortal Reams - Warhammer Community
Exactly, GW uses this tactics in 40k as well. And yeah, I also think they both can get some updates down the line after that, maybe even new book for ghouls and a book for the clan Skryre. Would be nice.