You make it sound like the L-CAL MC was holding on to this evidence all along, which is obviously not the case.
Sounds like new evidence that came to light based on the actions of a handful of L-UAL pilots. Take a look at the guys/gals who filed the lawsuit and brought this evidence to bear.
Would this new evidence exist if it weren't for this last minute lawsuit BS?
Also, the argument isn't new information. The submitted evidence merely backs up some previous contentious evidence that was refuted by the L-UAL MC. And based on that information, its some pretty important information.
It's likely too late for any of this evidence anyway...