I have 2 pre-devaluation JFK-HKG J awards booked for a trip later this month. 2 F award seats just opened. I thought I remember reading a few months back that some people were having success changing class of service but retaining old award rates for awards booked pre-devaluation, but the agent I spoke with said it will be at the new award rate. Has anyone been able to increase class of service without incurring new rates?