Amybd, you should probably write in to Business Extraa customer service to seek their written clarification of what they will allow. Seems like you should get a new year of in light of the involuntary change. I'd even support a change to different airports, basically waiving any change fee AA would apply for that. I would not be shocked if Business Extraa staff allow this without difficulty, but I also would not be surprised if they refuse. In that case you might complain to AA counsel or to DOT. One way or another, albeit potentially through regulatory duress, I am confident that AA will provide the benefit you seek.