The cool thing about this resource is that while I may have written it for Disquietus, there's nothing that would prevent you from using it in any campaign of your choosing. All it contains is expanded lore on vampires.
This vampire lore is inspired by Pointy Hat's Vampires of Sin. They are a combination between traditional WOTC vampires and Pointy Hat's original vampire mythology. I'd highly recommend watching Pointy Hat's original video on the topic. Not only is it simply an engaging watch, but his original vampire lore might be more your speed.
Also, Pointy Hat has stat blocks. Unique, balanced stat blocks made by someone (Pointy Hat) who actually knows what he's doing.