There is no such work in progress at the present. I am one of those senior guys you say would take the money. It's not the case and no one around my seniority feels that way. We will fight this to the death.
We lived all the supposed benefits you claim. Management preached it over and over. None of it came true. Keep in mind that control of the unions at Delta, AA and UAL for the next contracts will be mostly pilots who lived the RJ debacle and ended up furloughed. I can assure you like the senior guys they will fight it to the grave! The mere mention of outsourcing 90-100 seat airframes in a management opener will immediately lead to a woeful lack of enthusiasm. The feelings are that strong. The limit will stay at 76 seats. I don't even think a small weight increase to accommodate the newer 76 seaters that exceed the current weight limit will happen.
The other factor you don't mention is the poor performance of the regionals. That was a big part of Delta management bringing more of that flying back in house. After 20 years of trying they realize that it is not going to get fixed.