I am sure in the SRD employees only got what they would of received if they had not been SRD. The settlement will have been for much more than that, but the lawyers fees would consume that.
Ford knows most employees will just accept the package and move along.
They are hoping to get to 75-85% low cost country salaried workers before too much fuss is made by the released US workers.
The hush-hush nature is because the public sentiment tide has turned on companies cutting older workers and offshoring US jobs. They could easily cease to be a going concern, ergo the continual PR smarm.