Honestly, i think your DPS increases will come from getting improved gear.. seems like you are gemming and speccing correctly and the rotation is ok. There are plenty of things that can affect your DPS that cant be seen on the armory. Such as latency, keybinding/clicking, specific fight mechanics/movement. I would recommend speccing into heroic fury... it does make a big difference on a lot of ICC fights that require a great deal of target switching and repositioning.
You are, however, way over on hit rating, which is wasted stats. The leather DPS frost badge belt is (would have been) a much better choice given your gear set up. As well, the Gatecrasher Gauntlets are a better choice than the T10 once you get some other pieces of T10 so not to lose that set bonus.
Also there are no enchants on your cloak or boots. Look for Agi on cloak and agi/runspeed on boots.
It doesn't look like you are far off from where you should be. Just keep gearing.
PS. If you aren't using Landsoul's Spreadsheet, please go download it and learn to use it. It's been invaluable.
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