Whereas I would like to hope it were so, I don't think this is the end game of the BA v BASSA dispute. The Unions have invested too much capital in their war against BA and would never allow a company to achieve what most impartial observers will see as a thumping victory.
What might happen is Unite/BASSA recommending acceptance of the latest offer (having secured extra assurances on the assurances). With that out the way, they will take up the cudgles again over Staff Travel and disciplinaries. It's interesting to see BA has already put the Unions on notice that such bases for balloting might place Union members in jeapordy. However, remember, BASSA wants a guerilla war.. and just announcing a ballot is sufficient to put would be travellers off booking flights with BA and thus keep inflicting financial pain on the company.
The current BASSA leadership has nothing to gain from industral peace within BA. The only thing it has left is to bring the company down, Samsonlike, on its own and its members heads.