re: May need help from a Delta member on here

Definitely do it, it's super easy. You should see some MP signs as you walk up to customs, just follow them. As soon as you land, fill out the questions and generate the QR code. Just have that up on your phone and flash it to the attendant directing people into different lines. They will send you right to the front.

Doesn't help with the bag/going back through security situation, but if your bags come out quick you can get through customs fast. I'll be using it tomorrow in ATL as well. Safe travels!