The 7000 number is for this fall, but DL has noted that the total affected pilots will likely be much lower for Q3 2021, after being be offset by early retirements, leaves, etc. The company is currently working with DALPA to work those details out. My guess is that they will do something close to what AA has offered their pilots.
All that aside, no one is hitting the street right away; the #1 pilot on the list is being displaced, so literally everyone is subject to displacement. That's gonna take a long time to sort out.