For people that are lower power it's really hard now to get all the previous dungeon rewards, now that a few have accumulated. Maybe they could be bundled and/or heavily discounted?
We discounted the Little Reaper taskmaster at the start of season 5, as it had been a year since it was released.
We're planning on discounting the season 2 skins with the start of season 6.
And I may revisit the coin drops for season 6 a little bit as well.