I've done a few of the AA operated by JAL flights and have never been able to do OLCI. Most recent was BKK-NRT in January.

I just arrive at the airport a little early, just in case there are any issues. Last year I received a pleasant surprise when the agent said very apologetically, "I'm sorry but would you mind sitting in business class today?" For a SGN-NRT leg on a cheap fare, that was a very pleasant surprise. ^