Yes, the AoA warning system was supposed to be part of the basic deal - not being evident all times didn't surprise anyone. Press to Test days are not what they used to be.
One logical reason for it being where it is I suppose, is because it's by the Rad Height. Late-stage slowish flight might well have the scan going to that corner of the screen. (I've taken this from Mac's recent picture) I can't see any other justification for splitting it from the AoA dial symbol.