Sorry to piggy back of this thread but I have a similar question.
Do not wish to incur of wrath of BA since I am Gold and wanting to stay so.
Any views about this plan.
Use aa.com
1) DUB-JFK direct on AA (I don't mind putting up with the old 757 J seats for a day flight.
2) JFK-LHR direct on AA (its a 772 but with the new 1-2-1 seating configuration)
3) LCY-DUB on BA (less than 24 hours after arriving in LHR which I may have trouble difficult making)
AA does quote me a decent sale fare for this.
In my view, this is more an AA booking rather than a BA. I have always entered BAEC details direct into aa.com without issues. It about how much the BA booking system talks to the AA one.