IMHO, a close vote is not a bad thing. It shows BA that the pilots will not easily roll over. The pay deal was approx 70/30 in favour as well remember, not especially cut and dried.
If the BACC were to make a recommendation and consistently have a 99% vote in that direction, all BA would need to be concerned about would be getting the reps on side. The rest would be easy.
The membership are not easily convinced - not surprising given the occasionally cosy history of the past few years. I quite like it that way and I believe it makes the BACC position stronger as BA know they need to appeal to a somewhat broader base. Keep in mind the current set of reps are not likely to have the wool pulled over their eyes either.