[FB/HP] The Mystery of Dumbledore (Plot Rewrite)

After watching FB3, I was extremely disappointed, so this story came into being.

Don't expect much from the writing. Even I think it reads like a mere account of events. What I'm mainly writing is the logic. The discarded Brazil storyline could have been a whole movie, but I summarize it in one chapter.

Theseus wouldn't be so indifferent, as if Leta had never existed. Not after 35 years, and certainly not after 27.

Nagini wouldn't simply disappear without a trace.

Queenie wouldn't pass through the fire shield in such a frightened yet resolute state, only to casually switch sides for love again.

The story of Corvus Lestrange's parentage wouldn't be left unresolved.

Grindelwald's schemes wouldn't be so childish.

The key to the victory of the reverse spell wouldn't be recycling the Seven Potters plotline.

Tina wouldn't be a complete nonentity.

The mystery of Dumbledore wouldn't amount to retelling a story everyone had known for decades.

There would be a new character with a substantial role, useful for moving the plot forward, like Credence in the first movie and Leta in the second.

I'm an author with a fair amount of give-up-and-see-what-happens spirit. My writing is limited, so don't ask too much of me. The most important thing is to make it clear what happened.

Theme: Rewrite FB3 and save its tragically murdered logic.