I'm not saying BoS is bad. I'm just saying that people will most likely not play it if BoS = Obliteration, because Obliteration is easier to play. And people tend to play the easiest spec possible unless the more difficult spec gives a better dps output. Right now BoS will in general not provide more dps than Obliteration and therefore people will not play it.
My point is this: BoS needs to be better than Obliteration in all single target situations or it will die. 90% of the players will not use it if it is not a substantial dps increase.