I have recently posted the same question with not much success in term of an answer. My understanding is that MA is excellent in C (Euro business), but that the seats and IFE on the B 767 are very sub par (good food, I hear). Let's face it, their business class across the atlantic with connection to wherever in Europe is around $ 2,200 RT all included and no strings when the competition in Oneworld is at 3K for advance purchase, 7000-9000 at short notice. There must be a reason and bad/few connections in BUD is not enough. In addition, there seems to be no bonus miles for AA higher tier members.