Lets face it Blizz, a blood fear with a ten sec cd and 10% hp cost is useless now in pvp when compared to a spammable, unpenalized (I think stacks with haste now)regular fear. Fear is extraordinarily important for locks in a pvp setting as it provides peels and control over healers and moreover locks have been in the business of chain fearing and blanket silencing for a very long time. Pve'rs of course would never opt for blood fear anyhow as it provides only utility thus making this a talent choice completely and utterly invalid. May I Suggest this talent either be reverted back to its 5 sec cd or removed entirely because as it is now, it feels like a talent choice that actually makes an ability worse.
Locks lack of self peels in Mop will make us healer reliant once again like cata (resto shams only reason locks are viable). In cata at least we have coil and howl, now we're forced to choose between the two of them. And they're not nearly enough given the amount of counters all classes have. I can admit locks numbers were op but MoP has further nerfed locks as far as utility goes (Thats all we have in Cata).
My suggestion would be to make howl baseline and get rid of blood fear as its NOT BETTER THAN REGULAR FEAR anymore and come up with a couple new talents.