That's fair. I guess I don't tend to care about optimizing for heroics since they tend to be fairly trivial anyway; the ones that aren't are the ones that have a lot of spelldamage flying around, so BV is even less useful there.
Optimizing for Hyjal is an okay idea, but I've never seen an issue with just using a standard set. The only time I've seen our paladin die is when multiple aboms stunlocked him - and again, BV doesn't matter in that case.
If you really are just concerned about hyjal and heroics, I'd agree.
[Chestplate of Stoicism] is better. I just don't think that the gain there is worth the loss in general.