Well I looked over your stats, gemming, talents, glyphs. As I said, it seems you are absolutely fine with where you are at. Your over hit capped which is about it, so if you can replace some gear with less hit + more ArP or damage, that could make an improvement.
Also, Improved Demo shout isn't all that necessary if you want more damage. If you're rage starved, dip it into Unbridled Wrath. Also your rotation should be Rend -> MS -> Slam -> Use execute if active, then Overpower after. After the Over Power I suggest using blade storm for it adds more debuffs to the target, and the CD for Overpower and execute comes back after the blade storm.
Also make sure your rend drops off before putting it back up to get the full usage out of it.
If you still have the same dps, like I said. Fury is the dps class, arms is the dps class that helps enhance the other raids dps. With where you are at now, you are fine.