I doubt this will be sorted unless one side capitulates and both sides have mandates not to capitulate. Seems like both sides are playing to the court of public opinion, BA have been doing this from the start of course, just took the union a bit to catch up.
If BA capitulates they are stuffed. If the cabin crew capitulate then BA will still not have won as they have the other employee groups to deal with. And even if BA sort their employee cost-base problems out, the elephant in the room is the still the pension deficit.....
BA have The Establishment on their side which might be what makes the difference.