Alexandraa, a fine post.
A No vote will help in the evolvement of this (new) fleet which in turn, as you mention, will probably be an end to your flying career. On the other hand, a Yes vote sends out a clear message to WW/BF that we as a workforce are not happy with their latest style of imposition and suggested future of BA.
The ballot is not about sending a message. WW and Bassa have repeatedly said this ballot is about striking, and that you have to be prepared to walk out on day one, with all the risks that action entails. Comments like yours reinforce the Board's impression that lots of people will vote, but very few will actually walk on the day, and will thus result in Bassa's total humiliation.
A No vote, followed by instructions to your new union leaders to negotiate and to consult its members on where it is prepared to contribut your department's fair share of the cost savings required, would show BA's cabin crew to be the mature, sensible and conscientious group we all know they can be. Having spoken to so many cabin crew on this issue I know how the vast majority want that consultation and negotiation, which would result in the effects of New Fleet being minimised.
A Yes vote will just result in a failed strike and total imposition of New Fleet. It's not a way of sending a 'message'.