-Hit has a hard cap only, not a soft cap. You should prioritize it below the expertise soft cap. The ratings were changed recently, so I forget how much rating you need to get 8%.
-According to some, there is either a tooltip bug, or bosses now Dodge less than before. 22 Expertise soft cap
-You can not reforge primary stats (Stam, STR, Agil, Int). I believe you can reforge to/from Spirit, as I think it's now technically considered a secondary stat. (irrelevant for tanks, but useful to other classes).
Failure is not an option. It comes bundled with the software.