There are 2 or 3 senior captains here. Most of the posters here (who are captains) are 2014-2016 hires. Few exceptions, but not many.

For them, it's easy to blame new hires. They forget the double-digit seniority lifers, who either don't care, or are busy re-flying every flight on their flight simulator to see if they could've saved a bit more fuel than they did. Or are taking videos to see how close to the second they can time the second engine start to 2 minutes from takeoff.

Meanwhile, they will negotiate, they will figure out what happened with management, and they will come back with a new deal. And I can almost guarantee it includes backpay with the original date.
The latest MEC email suggests the same. Do your job, wait, and stop suggesting illegal work actions in public forums.