Regardless of what class wins it, the staff is only going to work for one spec (two if you’re a priest, I guess, but one could also claim a dps arcane mage and a healing mage are separate specs)
Why should healers have to fight other casters for their BIS weapon while casters get to cherry pick between two nearly identical weapon sets based on drop RNG? Not that it matters much, since odds are Blizzard’s already decided to keep the staff as-is.