I like they will let you fully cancel the PE ticket regardless of fare class for about a week if this PE to SWU promo fails.

I am sure all of the downside of this promo (min PE in the future, etc.) are all possible, but all anyone can do is take advantage for those who have SWUs.

I think we all agree AA is still a massive leader in normal award redemptions so there is downside to all of this (less inventory, etc.), but as long as there is a business class seat for sale, I can't fault the simplicity of the offer. That seems a bit rare among airlines. Obviously, that is why the window for the promo is small both to book and travel because just in case AA made a massive mistake in the promotion cost, it limits the potential problem (which I think is why it is limited to less than two days to book for the system to scan PNRs and upgrade).