9E shutdown? Not a chance. Not gonna happen. Sorry.
Delta has some sort of trigger point such as not being able to fully staff the 900's after first parking the 200's. Once the trigger occurs a new round of pilot incentives will be rolled out. It may take the form of mainline pay equality, but you have flow to Delta when your number is up or go back to current pay. Such a program will also have a sunset date.
A seniority number at Delta would fix attrition but money seems to be the preferred incentive.
Enjoy the free meals in the meantime. Small but nice perk. 9E management is working with what they have been given.
Oh, and if things aren't happening fast enough for you, leave. Many already have and many more will. Of all the votes you could cast that's the one that matters the most.