We recently changed a ticket from paid Y to paid J (not a redemption) to ensure my pregnant wife could lie down on an upcoming flight, despite being a fairly short 3-3.5 hours. Just noticed now that CX have swapped the A350 for a regionally configured A330.

I've had numerous aircraft swaps on regional CX routes in the past and normally I don't really care. However this time we paid extra (for 2x tickets) to ensure we got lie-flat seats and I'm pretty disappointed to see they swapped the aircraft. Does anyone know our chances of being put on a different departure the same day (there's availability in the J cabin on every single flight at this stage), despite no availability in our booking class?