AoA is a fundamental parameter in aerodynamic lift generation, it should be displayed to flight crew in airlines.
The AoA/G awareness training mandated for all EASA pilots that start training from the end of 2019 as part of the new mandatory UPRT package for professional licence issue is long overdue.
AoA/G awareness training cannot be done in a Simulator. Anyone who does not understand this needs to do a UPRT course.