Originally Posted by
aviators99
I have a flight on Sunday, and am not going to do any better than plain old Mosaic this year. Without the benefit of free EMS, I have no interest in even making sure I achieve that. Since I already booked this flight, I'm in EMS at no additionsl cost. I'd love to change my booking to credit to AA, as I'll be focusing on that now. Do you think I can do that without losing my EMS seat that I already reserved? I have a few more flights in the coming weeks in the same situation.
If I were you, I'd wait to change your frequent flier to AA until after you check-in for each flight. That way you don't have to worry about EMS somehow being stripped, along with priority check-in, boarding & baggage.
FWIW, I think there will be a ton of Mosaic Tier 1 crediting their upcoming flights to AA instead. There's very little benefit that Mosaic offer besides free EMS seating (benefit now removed until check-in and same as AA elites), free booze (apparently downgraded to one drink) and the Mosaic phone line. Getting AA Gold would arguably give better benefits to most Mosaic Tier 1.