I've never officially asked, but just as your first-class ticket comes out of D inventory when nothing better is available, I'd be pretty sure they'll do the same for coach. At first I expected that having a first-class rtw ticket book in my hand got me some privileges in situations like that, but quickly learned that's not so.

Worse, you may find it difficult to get any kind of discount-category bookings at all to popular destinations this late in the game. We have the same kind of paper, booked LAX-SXM (D) in June, called last week to inquire about a date change. Many giggles from the AA agent. Bermuda might be available, perhaps SJU, MIA, YQB or YUL if you want to visit a cold place. I think CX has no LTR's in NA so it's AA or open-jaw.