Originally Posted by
ryan182
I don't think SWUs being Y->W or W->J is too likely, for starters I would point out that Delta has not done that as of yet so good chance no one at AA has even thought of it. Second, Delta hasn't done that yet.
Delta is just in the middle of premium economy implementation. They only have it on A350s and some 777.
With respect to PE, DL is behind AA so they are followers in this case.