PsiVen wrote:You are correct in that the reason expertise performs so poorly is that it affects so little, while hit affects pretty much everything but is still not that great for threat. However due to the lack of a real need for threat I've taken to stacking it anyway -- not having precision is driving me nuts!
Agreed on Expertise. I'm very ambivalent about this. It makes the expertise on all the tanking gear virtually useless to us, and makes gearing to eliminate boss parries very couterproductive. On the other hand, it is nice not to worry about parry-gibs, and it's also nice that our threat stacking comes down to STR, STR, STR, and that STR scales so well.
As for Hit, two thoughts. (1) It does not actually affect nearly as many things as you think. SoV is not affected by it, since it's a dot. Consecrate and Holy Shield as well. Thus, we're left with only JoV, ShoR, and HotR. (2) The hit cap may be lower than you think. Definitely do some hands-on testing yourself before possibly over-stacking it.