I have to add here that
you got the freaking druid PVP bracers and boots! The Rogues stuff is the Vindicator's leather. You don't need Intellect and agility is much better for you than strength. Especially since you're a subtlety rogue with sinister calling. That 15% increase on your agility aint no joke.
I don't know if you're wearing that riding crop around all the time but, if you are, go to Honor Hold and do that daily to get the 3 towers until you get 30 marks. Then get the trinket in Zangarmarsh with them. It's called Mark of Conquest.
If you're serious about PVP, you need to get rid of that crossbow and get a thrown weapon. You can probably get a decent one in Halaa or the Nesingwary quests in Nagrand if you haven't done them. Deadly throw is nice for PVE too. Bows are just ass for rogues most of the time. They better have some damn good stats if you're using them over thrown weapons.
You're gem work is pretty bad. You need to get rid of the defense gem. Also, you should probably stop trying to stack critical rating too. Hit rating and agility are much better.
If you're going subtlety with hemorrhage, you want to get a weapon with high weapon damage like a sword, mace, or fist weapon. If you really like daggers, you should probably just do assassination.
Your spec is pretty crappy for both PVE and PVP. If you're going to do subtlety, take those points out of combat and put them into assassination talents like Malice and Lethality.
Take a look at my rogues. I don't wear a mounting crop all the time if you see it on me btw. :lol
http://www.wowarmory.com/character-sheet.xml?r=Trollbane&n=Kunoichi
http://www.wowarmory.com/character-sheet.xml?r=Trollbane&n=Kunoichilink
I don't meant to sound too mean here. Just trying to help out a fellow rogue.