haven't been told anything, i'd assume that everything will be done by either AA or AE as far as service goes, if AE chooses to not service the airplane (id' doubt that, as AA might be very unhappy with them for such a choice, and that is the hand that feeds them/us) But honestly, haven't heard a thing, in fact, i don't even think i have charts for MIA yet....
Also, don't think theres any word on a crew lounge as of yet, as i don't think it's going to be a base, nor is it supposed to be hub and spoke (as i understand it) just through station flying.