Review Detail of L0ST_W0RDS in [HPxJJK] - Harry Potter and the Supremacy of Cursed Blood

This novel is a masterpiece, the author combined the world of hp and jjk, perfectly. I would like to see the author give a little more prominence to some secondary characters such as: *Rose's* past, why is he so strong, where does his self-esteem come from, how does he single-handedly develop his cursed technique? Hermione's perspective (in the HP world she is a true genius and one of the most powerful and creative wizards) I would like to see how she develops her cursed technique and her perspective on the magical world. I would also like to see a POV of Arcturus and how he reconciles with Andromeda. Things like that that give depth and development to the characters. Author a question: Do purebloods have a method to choose the cursed technique, if they are not born with a technique? Or do they have to be born with a cursed technique?