Well if u become competent with discipline, wich since recent boosts became pretty strong, your raid leader will love you so much to the point you could question him about his homosexuality.
I mean, just imagine if every minute u could say "CRAP! HUGE DAMAGE INCOMING! j/k, spirit shell trolololol..."
Also discipline is the most unique healer along with monks healing you and your raid mates by kicking your faces.