thermostat
I take your point, but I think you go back a bit too far. Captain did caution the two remaining pilots to expect turbulence greater than they had experienced, and the crew discussed deviating "a bit left". Bonin even briefed the cabin (Maryann?) in regard the expected turb. Your conclusion that ice caused the IAS problem is not ironclad, the pitots failed simultaneously, and that speaks to other than blockage/ICE.
I rue the lack of CVR discussion, but unlike you, I do not conclude that the flightdeck was silent. I believe the bare minimum was released, and whether or not it was by the wish to slow public suspicion of a/c problems or for "discretion", we have a most incomplete and premature picture.
The speeds were odd, but not so unusual as to eliminate Windshear. TCAS and WINDSHEAR were present on ACARS, and remain unexplained; the actual speeds are after the fact, and a lack of comment initially by the Pilot flying might show that they indeed were not "crazy speeds" , except to say that the speeds may have given him the notion of overspeed, ("we have some crazy speed") not extremely low, as would be expected with pitot blockages. He has become pre-occupied with overspeed, is this in response to IAS? Surely not, unless he has sussed UAS, which most doubters refuse to alow him, due his "lack of training".
(lie)man