For one, you are missing a LOT of enchants. For another, the two trinkets you have are really really really bad for warriors. If you won't be raiding ToT I'd pick up a relic of xuen, or try and get the LFR/normal Lei Shin's Final Order. You aren't meeting the socket bonus on the belt anyway, so just gem pure crit there. But for the chest you're better off gemming crit and hit/crit. Your helmet you should meet the socket bonus, since it's 180 crit.
Anything else is quite hard to do without logs. But in all honesty, looking at your character I kind of doubt you really know your rotation. I'd advise really studying up on it as the next step.