Any more word on exactly when this is going to be solved?

I've got a residual value from a Delta ticket that would pay for an international M fare run for triple miles. If I find an all-northwest metal international flight schedule that I can book on Delta (whatever that means these days) - is it upgradeable right now? Or is the answer it depends? If so, what does it further depend on?

I'd really prefer to do a trip to SCL in late May, but of course that will be, at least in the ATL to SCL segments, native Delta segments, which it seems are not upgradeable with the NW Platinum SWUs for the time being.