D Bru, re AoA disagree.
As an instrument alert, Disagree identifies a discrepancy between displayed information, but unlike IAS / ALT there is no StBy instrument to resolve which of the two is correct. Thus the display should be removed - potential for hazardous misleading information - not knowing which one is correct; thus no display no need for an alert.
As a system alert for other unavailabilities as a consequence of AoA error, then each of those systems should inform the crew of the state of that system, with procedures as necessary for further action. Thus where systems have separate alerting and procedures, the AoA disagree is superfluous.
AoA Disagree might resolve, or add awareness to the state of other un-annunciated systems - not warranting separate alerting or procedure; if so the AoA alert is again superficial and distracting in a complex situation.
If AoA Disagree is shown, what is the published procedure.