I commend you for not going to a harsher bit. A harsher bit is never the answer. If the horse doesn't respond to a soft bit, there is a hole in the foundation and should be addressed as such, not addressed in a way that causes pain and MAKES the horse respond. Sure, hauling back on the horse's mouth in a harsh bit will get him off it, but at what price? The rider creates pain in order to MAKE the horse listen, and that's not right IMO. You should NEVER inflict pain to get a response from your horse. People needs to get "bigger brains" (which is more knowledge) instead of bigger bits or spurs.