Sorry if I am ten steps behind here, but what exactly has caused the talk about a possible crew change event?
The only way I could possibly see an actual pilot change is if the head captain wanted to be in the left seat to navigate through the unforeseen major weather event, and that I would suppose would be a long shot that he would have done that at such a time. "Here, let me help....oops, sorry, killed us all." I just can't imagine that.