I admit, I'm a bit of a jerk to have dropped the bomb that I did in my last column, regarding the new gearing paradigm described by Theck recently. It really is a huge shift for us and how we choose to gear ourselves, and I admit it is disconcerting at first glance. However, I assure you, it's based on solid theorycrafting and will allow you to tune your damage profile to something that will not only make your job easier, but your healers' as well.
Why so much hit and expertise?
So, as I explained in the last column, your gearing priorities will be the hit and hard (yes, hard) expertise cap, then focus on either haste or mastery, depending on taste (more on that ahead). Your dump/reforge-from stats will, sadly, be avoidance.
With regards to hit and expertise, the reason you want the maximum of both is due to the workings of our active mitigation system. In order to generate holy power, we need to hit things. Crusader Strike and Judgment must all connect to allow us to stack the good stuff (Avenger's Shield procs just need to be cast to build holy power). And thus, the more steady and guaranteed our holy power generation (HPG) is, the more reliably we can hit Shield of the Righteous and get its buff up.