What are the other class with interrupts/silences may you ask? Druid skull bash increases mana cost and can glyph into a bear silence and boomkins have solarbeam, counterspell which also silences and can spec into a talent that can silence, stun rogues have kick and also a silence, warlocks have spell lock which is also a interrupt/silence and ua has a dispel protection silence, warriors have a interrupt and can get an aoe one if they want to(preference), dks have a interrupt and a silence, shamans have a interrupt that is ranged(though I would not mind bliz giving them a silence). The only ones who do not have one are hunters(which have a silence and can get a pet interrupt if wanted), paladins. Now paladins...you got me>.< But besides that one class they either have a interrupt and(or) silence or something to make up for it.