It's like how Artful, Devesto, Pursuer, and Loveshot are still present in Forsaken, while Noli-ful and the Glasshouses map are removed from Die of Death.
Why does one side still have it when the other has ceased?
Me after I find that the Herosblade Sword Slash skin was disabled/removed from Corrupted Crossroads (it was the only skin I enjoyed for any ability in the game):