AoA is measured through AoA sensor, which are part of the ADR. If ADR rejected then altitude/speed/AoA rejected.
g < .5 does not meet the definition of abnormal attitute, IMO.
All three ADRs were rejected due to discrepancies between the measured speed values. Ice or not ice is not the question. If speeds match = ADR valid. If speeds do not match = ADR rejected. Simple as that. No magic
Fancy trying finding more reasonnable explanations than those of the BEA? Feel free to do
Scepticism is good
But please don't "just" ask rethorical questions