At this year's DragonCon, Jonathan LeCraft answered a question about class overhauls and revealed that “most” specs will have changes to better align with the “fantasy” of the spec.
No matter how many moving parts an encounter has, how it is ultimately tanked can be boiled down to one of a few formulas that Blizzard repeats over and over again when designing fights. As human beings, one of our evolutionary survival skills is recognizing patterns – many times, if you're like me, you'll be tanking a new encounter and think to yourself “hang on, I've seen this before.”
Protection is snugly situated in an excellent place -- a Goldilocks zone where our DPS is decent, our survivability is great, and there’s nothing terribly wrong or ridiculously excellent going on with our specialization. How did we happen to find ourselves in such a happy state?