Shadow, although that link is quite interesting it is nothing to do with this incident.
Most airline pilots would read that report and conclude rather quickly that the crew entered icing conditions without the ice protection on, the auto pilot held it as long as it could then let go. That was followed by the ice-protection being turned on as shown on the FDR. The captain saying that it was too warm for icing doesn't tie in with a freezing level of 12,000ft (they were at 23,000ft) and the severe icing forecast.
So although interesting, it is a waste of time if you are wanting to discuss this topic.
Framer.