Read a bit on FFXV: The Dawn of the Future. Meh. The ending was the best thing about the game. Alternate ending is not needed. It's everything before that needed more fleshing out.
Like the scene where Noctis gets Knights of the Round'd while his father refuses to watch. It's a powerful image. By itself it'd be one of my favorite endings to a video game. But you know what would have helped? Fleshing out the Noctis/Regis relationship throughout the game. And more stuff like that. ---