It it was not for the EMAS, there is a good chance that CRJ would have dove right off that cliff and everyone would have died. They NTSB would have pulled the CVR and it would have shown 1) Crew not following sterile cockpit procedures, 2) Crew not following SOP and 3) Poor CRM and decision making by the crew. Who knows what would have been found when they researched training records, comuting schedules, past check rides etc..
In short, this could have been another 3407 if not for the EMAS system. The media and public would have came down on PSA and every PSA pilot would become the new "problem" with the industry. 3407 was horrible, let this example with PSA show how easily your airline can be next featured on a PBS special.