Originally Posted by
b0928
It's incredibly, incredibly likely that they will add a vendor that takes BoS and gives you mats of some kind. They did it with Primal Spirits in WoD, with Spirits of Harmony in MoP, and Frozen Orbs in WotLK. I tried to convince them on the Beta forum to put the vendor in for launch but looks like that won't be happening. Just save them up, they'll be useful eventually on a double-gatherer.
As to a double-crafter, it obviously depends on how many you are using. You can get a few a day from world quests, but the best way seems to be dungeons at lvl 110. Normals seems to drop 2-3 per run on average, and heroics more like 3-4, at least they were a month ago on Beta. The drop rate from gathering (requires lvl 2 for that gathering type) is quite low, like 1 in 25 maybe? The shoulder enchant to get Blood drops requires Revered rep with Wardens, which is the hardest faction to get rep with since they are not attached to a zone of quests, just a handful of world quests up at any one time. On the plus side though, apparently the enchant can't be applied through the trade window to other people.
I personally rearranged all my professions from double-crafting to 1 gather/1craft, not bc of BoS, but bc of needing lots of mats to craft and obliterate gear. After two weeks or so I will drop gathering and go back to dual crafters and one dual gatherer.