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

[Liam_Harper]

So, there's a thing with offering XP at all. Even inefficient XP. To offer any kind of XP would have people using it instead of queueing for duties etc. This therefore reduces the pool of people in the queue for duties (potentially dragging out the queue further). Now, while there is the "Gotcha" of daily Duty Roulettes and POTD/HoH/whatever Shadowbringers equivalent will be, I think for SE, it's probably easier to not slap rewards on it in the first place. With Mentor Roulette for example, it's basically a glorified duty filler (and I'm not going to say anything more on that else I unleash another firestorm). They've probably considered this in a similar vein.

The only thing I disgree with there is the idea that other content must not be rewarding because we need to shove people into Duty Finder to fill queues. We can't remove rewards from content purely to shove people into other content. This is already why trusts are so slow and tedious.

Roulettes already offer tomes and much better exp than quests can ever give. If someone chose quests over Duty Finder, it's because they found it more fun. If you force people out of activities they find fun they're more likely to stop playing than anything.
Not saying this applies to New Game+ necessarily, but that if it did apply (that it gave exp, thus people chose to do it over Roulettes to level alts), that the idea of removing the rewards because people enjoyed it too much is flawed.