No way this is over. What they have really set up is the ability to choose fleet and demographics in the next round of axes.
100 from the bottom was just to create a legal (debatable) way to force everyone onto COS18, nothing more.
In 3-6 months, when fleet sizes are finalised, there will be more. Say for instance that bus flying changes to 320/350, but the 777 fleet is halved (or more), now they can chop 50% FO and CN from the fleet that needs it, completely out of seniority.