I suppose that if AA issues the ticket they will know the price and credit award miles and status dollars accordingly as a block for the entire trip. From what I have seen, it seems that the calculations would come out much more favorably if each individual segment is credited separately. I think that even segments flown on AA metal will get better credit as partner flights. But, of course, nobody really knows at the moment and some instability is to be expected at first. AAdvantage hasn't even mentioned rtw tickets in any of the new rules I have seen.