Cloth vs everything else (Score 1)

As a person who primarily plays a caster class I'd like to know your view on the caster perception that we are very stagnant in damage output once hitting level 60? In the last couple of months, now that more and more guilds are regularly defeating the end game instance bosses and receiving the "purple loots" casters have been posting on the WoW forums their jealousy of warriors, rogues and hunters getting significant weapons upgrades in addition to other equipment. Is this considered a problem or just casters "not knowing how to play their class" as is often said by non-casters? Are there plans to introduce new spells perhaps?

P.S. How are warlocks supposed to be played? ;p