I'm an expert and this is what I think.
BA have two big problems.
1 - Useless management.
2 - Useless workforce.
These problems stems from a culture and expectations inbred during the nationalised era.
Solution? Recruit decent management who only keep their jobs if they get results and set them to work taming the useless workforce. Give them powers to get rid of the dead wood. Stand up to BALPA, who demonstrate their fragility with other airlines.