Update from AA AAdvantage just now (via a phone call): "Loyalty points will post in late March or early April. There is not way to escalate or request an exception."

Oh well; I guess my move from Platinum to Plat. Pro will need to wait a bit. Hoping that long haul BA exit seat remains open for my mid-March flight so I can grab that for free vs paying $150. Only Oneworld Emerald can grab exit seats for free on long haul, in advance.