The idea is interesting, the author has interesting novels, the writing style is a little different, but it's easy to get used to (especially if you've readed any of the author's previous works), the protagonist's personality is practically the same as others protagonists of different previous works by this author, there are small differences, but if you read a previous novel by this author, then you already know the protagonist of this fanfic.
The story is not told in an interesting way, at times it is simply boring (in MY opinion), the story is taking place in a moment not explored in the original work, maybe that's why the author is having difficulties in keeping the fanfic interesting(FOR ME), most of the chapters (so far) were just about random and uninteresting quests, maybe it will get more interesting when canon starts again? I don't know...
For me one of the biggest problems is that this author has many novels, but he hasn't finished any, most likely this novel will be just one more of the list, well, take a look and have your own opinion.
