First, wonderful guide. Some changes you might consider:
It might be worth adding that expertise and hit should largely be ignored - or at least taken only incidentally to mitigation stats - at the moment. Sure they buff threat, but threat doesn't need a buff; buff something else instead. I'm raiding with ~2.5% hit and 6 expertise right now; a missed interrupt very rarely occurs and has yet to cause a wipe. To some extent this is a personal preference, as many people are religious about their threat stat caps. The reality of current content is that mitigation is
most likely much more valuable.
Glyph of Shockwave is great for additional AOE threat. Swapping out the TC glyph (+2 yards) or - as I prefer - the Resonating Power glyph (rage is not a problem in any AOE situation) gives you more Shockwaves. More Shockwaves make me happy.
Sharp diminishing returns on mitigation stats might also be worth mentioning. Even at current gear levels, stacking Parry in favor of Dodge (for Hold the Line procs) is not necessarily the most optimal approach. Without getting too mathy, I recently managed to improve my overall mitigation by undoing some of my Dodge-to-Parry reforging.