I think the only thing I'd change about the movie is to add a reference to the Avalanche trio somewhere - other friends Cloud wasn't able to save, and have their loss be another that burdens him along with those of Aerith and Zack. It's true he didn't know them well at the time, but he could have warmed up to them a bit depending on the choices you made in the game. And he could have come to regret not being able to save them as he wasn't able to save Aerith and Zack. Or the stigma could have brought it back to the forefront of his mind along with the losses of Aerith and Zack.