First off, the practice of putting inexperienced pilots in airliners & having them drone around for 2 yrs before sliding to the right seat was NOT the cause of Colgan 3407. It may have been one of the contributing factors, of which there were many. What Colgan 3407 did was open the public's eyes to this and other unsafe practices at the regional airlines. I think it's pretty unfortunate that resulting legislation is being attacked because it might not have prevented that specific crash.

Secondly, CA Renslow had taken shortcuts his whole career. He paid to fly turbine equipment for Gulfstream, then hired on at one of the few 121 airlines that would take a 600 hr pilot at that time. He never did a lick of instructing. I would argue that had this rule been in place, there's a good chance he would have spent a year or two teaching stalls to primary students and occasionally taking the controls when one got out of hand. Would that experience have prevented him from pulling back at the stick shaker, or overriding the stickpusher with 60 to 120 pounds of force for the last 12 seconds of the flight? Hard to say for certain, but I think it'd be less likely.