Just spoke to a Cathay agent via their Chat function and they mentioned that my chances of a redemption upgrade (PEY to J) are low given there are not many J class seats available and they are all for the highest price at the moment. My waitlist redemption expires 5.00pm on September 16...should I even bother trying again from Sept 16 onwards?

Flight is CX888
Sept 20 00:45
HKG to YVR