An industry team has been studying the role of PSM + ICR (Propulsion System Makfunction + Inappropriate Crew Respones) items for a few years now. One of the biggies was reaction to suspected fire. Either during takeoff, in the air or on the ground. The report is available through the FAA web site.
Regarding my undrestanding so far of this latest incident. If the tower was the only source of the initial report of fire or smoke, the latest recomendations would have been for the pilot to monitor instruments for evidence of fire in the nacelle and act accordingly (retard-shut down if necessary and lastly pull the fire handle). If no evdience of fire in the nacelle, then the pilot should monitor his engine instruments (and act accordingly). If still no evidence, than I believe that the recomendation is that the pilot should consider the possibility of a tailpipe fire which would call for him to shut off the fuel upon landing and motor the engine on the starter.
The idea was to reduce the possibility of inappropriate evacuations and passenger injuries where there was no fire threat to the aircraft (tailpipe fire).
Unfotunately things can be driven beyond the crews control if passengers start deplaning while engines are still running and you have to avoid using the starter in case a passenger gets in front of one of the engines.