Every plan has to have some wiggle room built in...The June 15th deadline was moved based on the premise of the end games, ie progress...hence the June 29th dead line where the company chose to take back all the progess made and present a regressive proposal...
Now the NMB has scheduled a July 9th conference meeting, not a negotiations session but a status update....One can only hope. I do wish that will be the last face to face with management outside of a 30 day cooling off period....
So for me July 9th is the critical date since it was set by the NMB and not management or either MEC.