Why the need to do anything?
The training ban is still effective.
Of course we can think of a plan B (picketing, rest of the trainers temporarily resign) should the company use the nuke option, but there's no need to do anything now.
If we had agreed to the TA last time, maybe the company would be looking at the same cost cutting measures now, but we'd have lost all leverage.
Is it such an improbable scenario?
We still have leverage.
We can sit on our hands for another year or two.
But be sure that if my salary/housing take a cut, I am ready to do more.