So, what do we know about DFW-HND, w/773, toward EoS?

I booked an F award seat for late January, but I think there was some discussion in another forum (or maybe another website), that the "F" seats were being sold for a premium but it was going to be "J" service?

Even EF seems confused; a few days ago, their "Flight Availability" tab showed a 789 configuration, but the seat-map showed 773. (This has since been cleaned-up.)

Any insight into this service? Did they just move the ORD 773 800 miles south? Is it a "permanent" change? (As permanent as anything can be in this day and age.)