They seem to have given up on the Adelaide pilots, and hope to get enough "yes" votes from the others for the offer to fall over the line.
From a management perspective, if the vote is any more convincing than 51/49%, then they offered too much!
All I can say is stick together, in the last five years I have been a part of two succesful EBA negotiations that have seen my pay almost double in that time. If you stick together and seek protected industrial action (which we had to do both times), they will eventually have to come to the table.
Good luck boys and girls.