every single one of those locks has blood fear spec'd into at least 1 of their pvp specs so wtf are you talking about man "3/6 now..0 before.." lol? all you have to do is look through the ladders objectively to see that this is dumbest argument around. no one 'took blood fear because it was a crutch', that's asinine. people took it because it was good and the UW health cost is ridiculous the way burst was / is atm. you can't use UW when trained because it's death. [that's the only other decent option in the tier and it still would have been a toss up at 10%]
...5/7 run demo specs.
conclusion; most of them chewed up rating when demo was broken. look at the comps. and all of them used blood fear..hardly sound evidence for a counter argument.
blood fear was an instant 8 second cc /10 sec cd.. that's unheard of and too good not take. and very needed the way locks were in 5.1.
that said; cast fear feels ok again PTR but this is largely because of the KJC buff in 5.1 and partly to do with the defensive buffs..has nothing to do with the talent not being needed when it was.
side note; its pretty amazing to hear a spriest talk about what's necessary for caster defensives..in 5.1... :| <3