Perhaps it's a fanfic set in a alternate magical universe. The original design of the Firebolt is lost, and Harry has to reinvent it based on ancient magical texts and his own intuitions. This could lead to exciting new developments in the story.
Maybe it's a story where a powerful curse affects the Firebolt, and Harry has to find a way to remake it to regain his edge in Quidditch and face other magical challenges. The focus could be on his determination and ingenuity.
There's a fanfic where Voldemort curses the Firebolt, and Harry has to remake it using ancient magic and rare materials. The process is full of challenges and discoveries.
One possible reason could be for speed. The Firebolt is known for its incredible speed in the Harry Potter series, and Harry might need it for faster travel between Hogwarts and other places, or for Quidditch matches to outrun his opponents more easily.
It could be a magical fantasy fanfic where Harry's vision reveals a hidden secret or a future event that sets off an adventure.
Well, it could be about Harry using his skills and magic knowledge to custom - create a super - powered Firebolt. Maybe he adds some unique enchantments to it for speed or stealth.
Maybe he loves the idea of the Firebolt in the fanfiction. It could be that the stories expand on his experiences with the Firebolt in a really exciting way.
The plot could be full of adventure and magic. Maybe Harry faces new challenges and discovers hidden secrets.
It might be a fantasy fanfic where the vision in Twelaney's class is a key event that connects to a larger magical conspiracy or prophecy.
It might be a fanfic that explores Harry's inner conflict as he serves Saron against his will, perhaps due to a threat to his loved ones.
I'm not sure. It could be a cat, a dog, an owl, or something more exotic like a dragon or a phoenix.
Ron is probably oblivious at first. He might not notice Harry's feelings for Hermione. He just focuses on his own relationship with Hermione. In the fanfic, Ron could be seen as a bit self - centered in terms of love in the beginning.