"New game plus - quests will have no rewards..."

[Malmstrom]

They don't have rewards in NG+ because they want it to be a pure option that we do only for doing it, not that it's something that we do because we feel we need to to get the reward.

They don't want people to feel like they HAVE to do it; look at people who ground trusts because it had a reward and HATED doing it. NG+ exists for its own sake, and while having a reward in it would be nice, I'm not going to be sad because I can't use it as a levelling tool in a game where there's no shortage of levelling tools.

>.> there is a reward? Guess I know what I'm doing next.