I’m probably in the minority but I like the theatrical line for the Leia flashback better than it is right now. It implies that Leia is fully a Jedi when she dies, and gives her an actual reason to stop rather than just because. It also mirrors Revenge of the Sith with how Anakin experienced visions of Padme dying, and chose to go to the dark side to prevent it. Here, Leia wants to prevent it at first, but chooses to fully embrace the light at the end, completing her training. And when Ben dies at the end, it fulfills the prophecy, but in a way we didn’t expect. I don’t think it really spoils the ending rather than foreshadows it, and the way in which Ben dies is still a surprise.