My only observation here is that if you redeem AA miles for the AA ORD-LHR flight -- with or without a continuing flight on BA to AMS -- your cash component for the redemption will be negligible. Here's an example for a departure tomorrow night (with no LHR-LCY transfer) in Business Class:



Keep in mind that all AAdvantage flight redemptions are now fully refundable, up to scheduled departure time. If an ideal award itinerary should become available down the road, you are free to cancel and rebook.