Fact: Priests, Shamans and Druids get staffs, along with an assortment of 1-handed weapons they can use with off hands.
Fact: Paladins of the Self-Righteous variety (*cough* Holy *cough*) only get to choose between a handful of 1-handed weapons.
Totally My Opinion: Blizzard should implement 2-handed caster maces. Paladins would get another option, maces are totally sweet, it makes sense for Shamans, Druids, and Paladins to have a gigantic mace, and, seriously, I have to admit: I would love to not have a shield for just one tier.
We'd get to cross our fingers on weapon drops for more than one boss.
We'd look TOTALLY SWEET. RAR!
With 3 classes and 5 specs being able to use 2-handed maces, adding it to the loot table wouldn't clutter things up so badly.
Did I mention it would give us more options for loot?
Yes, gigantic caster maces would be amazing.