Well their is still speculation if we will be compensated for our work such as getting levels that we earned after 20 (you get A more for every level) so we might be able to turn motes in for levels up to 40. We do know that you will instantly be allowed to get one guardian up to playing field for TTK and that the level is still unconfirmed, but going back to 20 seems fair because we used light to gain power not experience.