Ftoomsh of Aman'Thul is hopping mad that Shamans will be getting Hex in Wrath of the Lich King. Green with envy, she feels that Mages are already being rendered obsolete in PvE. Polymorph as a unique ability should not be added to a pool of skill for more classes to draw from. The original poster jumped to the conclusion that giving this ability to Shamans make Mages completely useless.
Baah, I say. Hex is similar to Polymorph, but is definitely not the same spell. You might even say it doesn't go the whole nine yards. Several of the responding post reminded Ftoomsh that the Hex ability in its current form only lasts ten seconds. On top of that it set to a one-minute cool down while Polymorph has no cooldown but diminishing returns. The frogged character will be in control of their movement, but ill not be able to cast with the debuff. I'd like to add that Hex does appear to lack the healing mechanic of polymorph.