People saving gems = less money for Konami. Meanwhile they need extra money to compensate their hard work creating new world. So, here comes Karma Cut. A box that won't change the tier list but still many people will buy it especially Shiranui player.
Even if Xyz box contains Levianeer or Fiendish Chain I would still be disapponted if it doesn't give us new meta deck. I hope the new worlx box would be Dark Dimension 2.0, not Stardust Acceleration 2.0