The Point of This Weapon?

Can someone tell me what this weapon is supposed to be good at? It has less armor pen than both the Morningstar, and the Flanged Mace, has SIGNIFICANTLY less damage than both (A white Morningstar has 37 damage, while a legendary Club has 36), and it can be used by the same classes that can already use the better versions (Flanged/Morning) with the addition of the Barbarian, who already has significantly better choices in the horseman’s, and hatchet (even though it’s a secondary). Can someone explain this to me?