If anyone is still interested in a last minute share, I might be able to help - PM me.
Stop being so nervous. Unless you're not planning to burn these within 12 months time or so.
Worse comes to worst, the devaluation may come but you'll be in a far better position than most to cushion it.
As it is, most people will do well either to make their last US DM redemption, or book ASAP when the ability to move to AA occurs (i.e. a travel goal within 12 months of the merger in earnest).
500k points, so about 250k each and over 2 promos - quite possible to rack up that amount using a "warehousing" account.