Sooooooo.....are you guys saying that
1/ the sick shaker went off early due to the ice switch
2/ if they had done nothing but let the flaps run (they had already selected F15 one second earlier), and set an appropriate power setting everything would have been pretty much normal.
3/ the inapropriate reaction to the stick shaker pretty much took an aircraft that was a little slow but still a bit away from the stall and with lift devices running....and stalled it big time with the aft movement of the yoke.
Is that the hypothesis?