This has Mike Flanagan's footprint all over it.
Which was absolutely wonderful for me, since I've loved everything I've ever seen from the man. Midnight Mass was one of my absolute favorite series ever, and while I don't think this quite reaches that high, similar to his previous work, while being a horror show on the surface, at its core this is a series about justice, opulence, familial loyalty, and just how many innocents some people may gladly trample on in order to obtain power. This is all done in a delightful Gothic atmosphere filled to the brim with Edgar Allen Poe references.
This series isn't going to create any new fans of Flanagan who disliked his past work, and if you're the kind of person who really values realism and strict logical consistence, this probably isn't for you, since the crux of the story really is about the higher level themes and Flanagan gives zero shits about deploying a little magic when he feels like it. But if you have liked his past work, you're in for a treat.
Also, if anyone happens to have any personal connections to the Sackler family, consider forcing them to watch this.