If the AoA is being monitored by the 'system' why not include it as part of any related 'aural'.
I don't need to continuously monitor an AoA indication but ...
"Stall warning 10, Stall warning 20, Stall warning 30, Stall warning 40"
... would sure get my attention ...
and ...
"Stall warning 30, Stall warning 20, Stall warning 10"
... just might let me know that ND was having an effect.