A little off thread I'll grant you, but in my opinion BALPA are running scared of IAG due to what happened with Openskies. Back then, they were absolutely certain of their legal stance and then all of a sudden it was proven to be wrong. The whole idea that Veulling or any other IAG owned company could just come in and replace BA shorthaul is contrary to the spirit of UK employment law, however BALPA are petrified that BA would find a way. As a result, they agree to anything and everything. It is the same with the current rostering farce.
Would I join BA if I was starting over? I'd certainly consider the job as a stepping stone, but there is no way I'd plan to stay for the long term. I know pp17 SFOs with interviews elsewhere. Traditionally they'd be well and truly locked into the company for the duration by that stage.