Why don't Tanks have attacks that can cleave multiple enemies?

[MPNZ]

Maybe give WAR a wide cone cleave or two that does much less damage to non targeted enemies. PLD, I think just needs one, if any, but I would prefer lower TP costs (because that is why you have a shield, besides protection) and more skills focused on dealing with enmity generation or just passing off their aggro in sword oath to another character or pet. DRK... I would really like it to be less frantic with, skills to handle unexpected adds like a wide area ability that shifts all emnity toward itself and interrupt attacks, and a few skills that would change when certain conditions are met (like deactivating Darkside would unleash Darkness and restore the players MP at the cost of their HP while damaging and staggering enemies).

Edit: It would also be great if PLDs to have a wide area cover, and for sheltron to be able to completely block most attack's damages against other players within a cone.