Dec 2020 J award ORD-ATL-DOH-MLE-DOH-PHL-ORD was just cancelled by QR, but they have not offered any sort of rebooking. The AA rep was completely puzzled and couldn't find any availability when searching alternate dates and US gateways. Hoping to escalate to the OneWorld Liaison. I received an email from QR about the cancellation as well as a web form to specify an alternate airport, but received nothing in the promised 48-hour turnaround time and a call to QR directed me to call AA as I would expect for any changes.
Is my understanding incorrect or is the airline responsible for an alternative routing when changing/cancelling a flight?