Hudson
Doing a mag drop and prop test is a simple procedure which becomes second nature. A mag drop is just as apparent in a moving aircraft as in a stationary one. There is no reason not to do it while moving anymore than any other ground procedure like radio calls or setting the transponder.
Expeditious operation is not a "blinding rush".
It was not an issue in this accident and I can't quite understand why it has become an issue in this thread.
To err is human. We have all done it and we will all do it again. Lets just hope that we are not faced with a life or death situation when we do so.