Maybe you should talk to the NW pilots about how much they like being "Delta." A good friend of 25 years was a NW A330 captain. He hates Delta so much that he is taking retirement at age 56 to put as much distance between himself and your much-loved Delta. I doubt he's the only one.
There are some ticked off former NWA guys---and some ticked off original DAL guys, too. My general observation has been the moderately senior and very junior NWA guys have issues, and the mid seniority DAL guys have issues. The amount of change in procedures and aircraft basing/destinations has caused plenty of angst for both sides, as well.
That being said, the merger was a good thing for both airlines.