$950 being a misdemeanor isn't unreasonable on its own. It becomes unreasonable when you combine it with misdemeanors not being prosecuted, so it's not fair to compare the threshold in places that do prosecute them with places that don't.
Lowering the penalty for shoplifting to a misdemeanor would make it more appealing than the potential 20 year federal sentence that would come from federal prosecution) that robbing a train carries...not encourage robbing trains.