Your spec could use some cleaning up. Virulence isn't very good for a Blood build since most of your attacks are going to be physical. Also if you want to get used to Blood you might as well remove Lichborne from your build since it's being nerfed to all hell when the expansion comes. Lastly not having WotN is silly since you're going so high into the tree.
I would suggest this:
Talent Calculator - World of Warcraft
Blood lacks the skillz to pay the billz when it comes to AoE tanking. Morbidity and Corpse Explosion will help with that.