Without knowing your dps rotation, many things jumped out at me.
You're at 499 hit rating, the cap is 263. Get rid of that Hit trinket and get a Mirror of Truth. ilvl =/= automatically better. If you have the gold or time put together the Darkmoon Card: Greatness +90 str deck. DM:G is one of the best trinkets in the game, and is still good through ICC.
Your meta gem is awful. Replace it with a Relentless Earthsiege Diamond (http://www.wowhead.com/?item=41398). You're going to need to get a Nightmare Tear (+10 all stats) to activate it. I'd stick the Nightmare tear in a blue socket that would give you a Str bonus. The Nightmare Tear will also activate the Meta gem, so you can replace the +20 crit gem in your legs and the +10 str +10 hit gem in your boots. The Armory might be wrong, it's not showing a gem in your cloak.
Keep working in Ebon Blade and Sons of Hodir rep for the head and shoulder enchants. You can buy rep tokens with Emblems of Triumph to speed up the process. Get a Icescale Leg Armor kit and slap it on your legs plates (http://www.wowhead.com/?spell=50967). Get rid of the +100 ap on your axe and replace it with the Berserking Enchant. Level up your Blacksmithing so you can place extra sockets in your gloves and bracers. You have maxed out mining, so gathering mats will be easier and cheaper, if more time consuming.
Your Major Glyphs all need to be replaced. You want Glyph of Judgement (+10% damage to Judgements), Glyph of Seal of Vengeance (+10 Expertise when SoV is active, that would put you 1 point short of soft capping expertise), and Glyph of Consecrate (+2 seconds on the duration and cooldown of Consecrate). A lot of people question the Consecrate glpyh, it saves you mana by making Consecrate last longer, and much more importantly will clear up many GCD clash issues.
If you get a moment, can you type up what your Ability rotation and priority system is?