A useful review of checkmytrip, Tripit and App in the air as replacements for MyFlights that can provide automated alerts of flight changes near and at the time of the flight.

These contrast with AwardWallet that can be used to manually initiate checks in advance of flight. So in principle I think that AwardWallet and checkmytrip could give complete coverage of changes to BA and other Amadeus flights. Automated alerts of changes to other flight would need a subscription service like Tripit Pro or App in the air.