It would have been nice if you had been upfront about the fact all the images are AI generated, as another person commented. I thought it was a tad bit off all the Dwarfs were regular sized, until I saw the hand error on one of them.
Personally, I'm not as up-in-arms about AI as some people are (especially on your amazon reviews), but it is a bit annoying to spend 15 dollars wanting to support the artists behind this as well only to realize it was generated. This is by no means cheap either: 15 dollars for a PDF is enough to buy entire ttrpg systems, and the physical copies are 20+ and 40+ dollars! It would have been nice if you guys were up-front about it. The brutal reality is that yes, less people would be willing to buy it unless it's price was massively reduced, but simply not having any art and being up-front about it also would have been immensely appreciated and worth a buy. While I will say I'm somewhat annoyed I won't renounce this purchase, but I definitely don't really want to buy anything else from this line of product either.
Just be honest about it. Some people care. Some don't. But charging what is meant to be an agnostic supplement filled with generation that costs on-par with the things it's supposed to be just a supplement too? Please understand -why- it rubs people the wrong way.