If I could change parts of the game, I would allow the player to play as Aerith at various points in the game. This would establish a greater rapport with the character and allow you to see the story from her perspective.

I would like to have had sequences of her thoughts before and after her death like that small novella, too, as I think it would show that her death was meant to be. I think that the final nature of her death was established in the game as the characters have no way of communicating with her and she, personally, is never heard from again, but this is contradicted in the Compilation of Final Fantasy VII because she is always available in events that took place before the game, dream sequences, and flashback sequences.

I think that it would be alright to add more of her perspective, before and after death, to the original game.