I've seen the issue is being addressed but just want to further echo what others have said about PDF quality to Paizo. This compression makes it hard for me to even want to read.
As others have noted already but.... I'm also an artist, and I only get these books to look at the art as I read rules (otherwise I'd just use Archive of Nethys) and previous releases had some compression which is obviously necessary but this time it's just too much.
Glad to hear it's being addressed but until I see those changes I can't find myself wanting to get future PDF's.