The whole "Building the world" similar to Legend of Mana is actually a bit of Gameplay and Story Integration if you think about it - since technically, Marche and his friends created the world using the grimoire, that's actually Marche imagining where things would be. (Although some like the palace and Ambervale are in pre-determined locations)
In an early mission, you save a professor from three 'lost ones,' the animated corpses of people that are lost in the snow. Their names? Colin, Lyle, and Guinness, the three bullies from St. Ivalice. You then proceed to kill/exorcise them. Later on, you fight them again, this time as vampires.*
You do see the three bullies at the end of the game, so they were apparently restored when the rest of Ivalice faded away. But there's more fridge horror. Do they remember?
Even worse is the fact that everyone in Ivalice is someone from the real world with another personalty forced onto them and the kids are rather okay with it.
What about the fans who are OK with it and insist that Marche is evil for restoring things to the way they were?