I appreciate dutch_122's help in getting seat assignment within 24 hours of the flight. However there is still no way of obtaining the Amadeus Record Locator, meaning not able to pre-book exit row seats for OW Emerald/Sapphire, at least for AA passengers. I am sure with the BA/IB merger, BA passengers have better access to seats prior to the flights.

Also a little side note, but when I called the Iberia US call center, I was told that they have an Iberia person staffing the Premium Lounge at MIA Concourse E. This is not true. They have a BA and AA representative there, but no IB representation. So no printing of IB boarding pass or changing sets there. The only option at MIA was to go landside to Iberia's ticketing agent. However there was an Iberia desk at MAD T4S arrival just before Passport Control, so you can pick up an Iberia boarding pass there.