I don't see it as scope relaxation. If the FAA says you need to change the weight, that's fine. You just can't operate those aircraft with Delta code anymore. That doesn't stop you from flying them for anyone else that will let you. Or starting your own code ala Expressjet or Independance.
Now, if management came to DALPA and asked for relief and we stupidly gave it to them, than then THAT would be scope relaxation. Realistically, it will probably have to be settled in court. Which contract has more juice, RAH's with Delta or the CBA?