This makes sense and stinks of RM being sneaky and making changes without even communicating them to travelers. I guess there as no way for the marketing interns to spin this one into something positive, so DL just made a stealth devaluation and hoped nobody would notice?
Another obvious money grab... and I can see this hitting and upsetting business travelers who end up wanting/having to SDC to a later flight because they are running late from meetings etc and now can't. A couple times of being hit with having to re-fare last minute and pay 5x their original ticket price will drive people away quick.
The DL smug attitude continues... I was really hoping there would be a meaningful downturn in travel so the airline would perhaps get a reality check and realize that pax are not ham sandwiches.