DATA POINT/Airport/Lounge
A significant number of outstations (mainly those which are not equipped with barcode scanners e.g. WAW) will question the AZ electronic boarding pass (note: the Add to Apple Wallet option doesn't seem to work), it is therefore good idea to print it before heading to the airport even though, again, the SkyPriority issue comes into play.
MILEAGE/FLIGHT CREDIT
AZ MM members (also in other forums) have reported issues with miles/flights credits and this, unsurprisingly, seems to be the case also for FB members so keep your boarding pass!