Actually the Bus does provide AoA indication to the crew, as does any aircraft that displays PATH. It's the difference between PiITCH and PATH, both of which are staring you straight in the face.
Interestingly there was no mention of this in the most recent Airbus training movie related to stall awareness and recovery.
Admittedly the presentation doesn't display the AoA as a percentage or limit, and neither will it function if air data is compromised or lost entirely.
It beggars belief that space cannot be found on the panel (as it was on all biz jets until recently) for a simple, direct reading, non air data instrument, the like of which would clarify the situation as a last resort for a confused crew.
Further, when faced with erroneous air data I would argue that a direct reading AoA is an indispensable piece of equipment that should be mandated.