Have two person award tickets on hold DFW-ATL-LHR first leg on AA metal, second on BA metal. So of course fees are $740pp thanks to BA across the pond. If I cancel these awards and change to another flight combo (with or without BA involved) will I lose any of the fees?

Never flown on a BA metal based award in the past, but the AA miles required is nuts compared to BA, and its a FC on an old 747 (unfortunately not the new FC seats) and never flown true FC internationally

Asking because I will probably go ahead and book these awards, but am keeping my eyes open for a AA direct (to reduce fees) or BA on newer plane in Biz (seats are actually nicer than old FC it seems). TIA