Hi inasmuchas,
Thanks for your reply, I did find it helpful. I think you're probably right about not dividing up earning/status potential. My experience flying with AA hasn't been as good as other airlines and I'm not too happy about their fight with BA over transatlantic (e.g. no AAdvantage miles flying on BA).
With not having experience of the other oneworld programmes, I wanted others' input as to whether another programme trounces AAdvantage, as I was wondering if now was the time to make a change. 50,000 miles isn't much though, so I think boosting that with these flights will make for a better redemption, so I'll probably take your advice and stay AA for now.
Cheers,
David