I saw it and enjoyed it. Having read the book, seen the original movie, and read something now and then about demonic infestation, I thought the episode was interesting. And frightening.
It seems less like a remake than something much ‘inspired’ by the original idea. Some of the characters and some of the plot tracks along the original lines but much is different.
I’ll give it a go for a few more episodes.
I also read the book and saw the original movie several times, plus the two sequels. The third one with George C. Scott was chilling to me. I’ve seen at least one or two documentaries about the original possession that Blatty based the book on. The movie Possession (2004) with Timothy Dalton and Christopher Plummer was another good movie...at least I thought so.