For the question: Do prot warriors need hit?
Well, yes. Prot warriors need hit for the main reason of... YOU DONT WANT YOUR TAUNT TO MISS! (example: In naxx, during the boss fight "gluth", two tanks pass off taunts. Say your taunt misses and your other tank begins to get etc. debuffs. Thats a problem.) It also helps for devestate, etc.
Hope this helped!
-Frizzilld, realm: Eredar