CONFiture
... the absence of appropriate manual adjustment of thrust can present a risk of an attitude/thrust mismatch, especially when this disconnection occurs with a low N1 value."
Is there reason to believe that AF 447 was operating at a low N1 value?
From the excerpt techgeek cited, my instinct was to presume (perhaps incorrectly) that the risks of this problem would tend to be greater during landing.
That said,
...
thus lead the autopilot to command movements of the flight control surfaces that are inappropriate for the real speed of the airplane.
appears to be what Svarin was alluding to a few dozen posts back.
The prospect is scary, be ye pilot or be ye pax.