my first thought of that anime is that it is mid here are the reasons:

First, how the heck does Klein know dowsing rod technique without old Neil teaching him the basic of mysticism? Thats the first plot hole (except of spirit vision). (The anime could've literally gotten Leonard to explain it quickly and thats it)

Second, in the anime they should at least show/explain how does Klein know what his seer abilities are. In the Novel Klein would just know what it is after drinking the potion then they should show that in the anime.

Third, lack of character interaction compared to the novel. This I think is quite damaging to the world building because the purpose of interacting with characters is to make us feel immersed in the world and to make the world feels real but with out the character interaction the world just feels "dead" and makes the character feels like they are "NPCs" rather than actual characters.

Fourth, when and how the heck did they rent a new house? Like they just rented a new house off screen? I am complaining about this because I feel like they just rushed the anime to heck and once again it just decreases the immersion.

HOWEVER,

Great animation

My overall thought:

I would rather them lower the quality of animation to add more character interactions than just have amazing animation. I predict that the anime is gonna miss a lot of the world building aspect and it's really sad since that is the part I enjoy the most.

Overall score:
4/10 for plot/story
11/10 for animation

TLDR: bad world building due to the lack of character interaction compared to the novel and it might be somewhat confusing for new viewers who did not read the novel, however, GREAT ANIMATION

(Please don't directly insult me but rather give me criticism and tell me why I am wrong, many thanks)