1) The writting quality is good for this platform and it is the story's saving grace, but also means it is average if this work was published in a developed platform.
2) The updates are constant and rigorous, I give props for the author commitment with his readers.
3) For whatever reason, I think the author is "milking" the story, halting the main plot progression and filiing the story with some tinkering in the Hp world, like creating a company, magical experiments and etc., the latters aren't a problem on itself, but the balance between the main plot progression and them. In suffice, if this was a paid novel and not a fanfiction I bet people would be talking about fillers and word count, things that authors do to drag the story for extend periods of time. I have no idea how things work on pa.treon.
3.1) If the tags "slow pace"; "Business management" were here I'd be less miffed about it.
3.2) For reference, HP and the sorcerer stone have little less than 77.000 words. This story still are in the first year of Hogwarts with 114 chapters (approximately 1,5k words per chapter according with author's estimation). Besides, Rowling did the world building from scratch, author have a sandbox.
4) Initially, the character development was one of the things responsible for the story's initial momentum and, ironically, author - in his notes - pointed out some inconsistencies with Rowling's original characters's profiles, but then he ended up creating some of their own.
Let me explain:
4.1) Harry is a trasmigated OC, he has something that people with depression and anger issues strives for: a third view perspective of the situation, in a way for them not take things too personally and affect their mental health. The character internalized this problems so much - abuse, child endangerment - that he end up appearing as an unstable sociopath.
4.2) Hermione. I don't what's the author wants with the character. I suppose that he idolize her so much that no matter what she does against the MC and creates a circus drama, the consequences are a mere afterthought by the author with a meaninless development, in a way she'll always remain as main female character. Furthermore, the circle repeats just to stir the readers I think.
That's my review up to chapter 114.