Sensor validation:
For lots of detail on the AoA vanes see the Perpignan crash report. The vane may indeed generate a "local angle of attack" but "As the fuselage disturbs the flow of air, these measurements
have to be corrected to obtain the aeroplane angle of attack." I wonder if its the compensations that limit the use at lower speed, but then where does the speed come from?
Th 60KT limit may also be an almost arbitrary "safe" limit withe the rational that if airspeed is that low you are not flying anyway?
This would also help eliminate spurios alarms durinfg landing.