Well a good first step to any good optimization is enchanting all your gear
You are at 21% Hit which is way too much, try reforging off some spirit. You only need to be at 17% for hit cap.
Of course the PvP gear needs to be replaced. If you ever get the chance to choose what tier you want, your best bet is to get the Resto Tier Chest and the 4 other balance Tier pieces.
Your PvP boots are easily replaced by the VP ones the Boots of Fungoid Growth.
I would also try to shoot for new trinkets. The Trinkets off Yorsahj and Spine of Deathwing are your best choices if you have the chance to see them drop in regular or LFR.
Doing all or even some of these things will most likely improve you at Balance on a gear standpoint, after that it comes down to rotation and good DOT usage.
Edited by Tens, 22 April 2012 - 08:15 AM.