It could be that the character's development doesn't match the original or expected traits. Maybe they act out of character or the story takes an unexpected turn with this aspect.
Well, this kind of fanfiction often reimagines Harry as a female and might explore different storylines and character developments due to the gender change.
Well, if Neville was the 'Wrong Boy Who Lived', the entire magical world's perception of heroes and chosen ones would shift. It would also change how his character develops and how he interacts with others.
Typically, such fanfiction plays with gender roles and expectations. It could involve new magical abilities or plot twists specific to the fem version of Harry. The world-building might also be expanded or altered to accommodate this change.
This fanfiction might be interesting because it allows fans to envision different possibilities within the Harry Potter world. It could introduce new elements or reinterpret existing ones in a way that captivates the reader's imagination.
Well, sometimes there are crossovers with superhero universes, giving Harry unique powers and allies. Another might involve a time-travel element, allowing him to interact with characters from different eras.
It could be that the fanfic doesn't align with the established canon or character development. Maybe it strays too far from the original story's themes and plot.