I just watched MoP intreduction cinematic where the monk uses a staff with alot of smoke and air trails, which fits the fantasy very well.
Thinking about it deeper made me think on what is missed on a monk, and for me its the use of a weapon and some better animation smoke/air related.
One of my thought is: Smoke Bomb! yes, the Rogue pvp talent, but different.
Monk’s Smoke Bomb (same animation): All friendly players inside the smoke bomb have a high chance to evade incoming damage + enemy cannot cast spells on the players inside the smoke (or vice versa, enemy standing side the smoke cannot cast spells on targets out of the smoke)