So I just popped into a Pinnacle of Storms on LFR when I noticed there was one tank and a pair of mobs separating us from Lei Shen. What do I do? Switch out my specs a bit on my Demonology Warlock and give them a hand. The other tank agreed and we pulled. I did what I could to keep her protected with Fury Ward on the Thunder Lord while the other tank kept the Lightning Guardian at bay. In the end, we were able to successfully down both mobs. And great timing, the new tank comes on in.
Seriously. I really think Blizzard needs to take Warlock Tanking seriously and implement it as a legit tanking spec for a future patch/expansion.