Travelled to New Orleans on Wednesday and this is what happened:
PNR 1 Mrs Nickor F reward SYD-LAX QF
PNR 2 myself revenue J SYD-LAX QF (upgraded to F)
PNR 3 both of us revenue F LAX-MSY AA
At checkin I asked the agent to check our bags through to MSY. She was very apologetic but advised that from Sep 1, could no longer do it. After some friendly chit chat about the issue, she said she would go and speak to the supervisor.
Upon return, she said that there was one exception to the new rule and that was for reward tickets. As it is not always possible to book connecting flights with reward tickets (especially 353 days out), they will interline bags for the reward ticket only. So both our bags went on Mrs Nickor's PNR. Worked OK for me.
Checkin supervisor came over at the end to apologise for the delay (it took 20 minutes to checkin) and said "nobody is happy with the new policy. What is the point of the Oneworld alliance if you can't thru check bags but you can to EK?"
I agreed and she said "hopefully someone will soon see sense and the policy will be changed."
Not holding my breath but good to know the reward exception exists as I have similar arrangements booked for next January SYD-MIA.