This affected an EasyBiz SAN-HNL April reservation on hold.
Nonstop fair jumped from $383 RT to $728, was necessary for agent to manually process the "change" - new fare classes - before I was able to complete the reservation. I don't fly basic economy, but that option is currently unavailable on the route - nonstop or connections.
Assuming revenue management will go back and adjust fares, once the new fare classes have been implemented. May be best to wait a few days before booking travel.