I'm not the most educated inside prot warriors
but atleast for fury warriors they say that 200+ hit rating is requires for raiding end game...
Myself i had 190 before i switched my shoulders, and now i have 170... And you only need like 150+ to hit on every special attack. bloodthirst, heroic strike etc... the 200+ is for all attacks i believe.
Hit rating food for raiding if you cant get the 200+ is a idea
i am gonna change out some gems eventually to get the 200+
Expertise rating i don't have much clue on tbh, i have 0, and i can't say i miss any