I like the thought of increasing the penalty for intentional penalties. That would be the only way you could strenthen the instigator rule. Fred Shero took full advantage of the original instigator rule by having his players take liberties against the stars of other teams, knowing that if the enforcers retaliated they would be booted, giving the Flyers more room to assault the skilled players. In that era the instigator rule actually resulted in a more violent league.
Look at Russian hockey from the early 70's (Shero by the way modeled the Broadstreet Bullies on Russian hockey) Fighting was forbidden yet it was probably the dirtiest hockey ever.
I was lucky enough to witness first hand, arguably the greatest hockey team ever, the late 70's early 80's Edmonton Oilers. Like it or not, Dave Semenko bought room for Wayne Gretzky to show his stuff. Without the enforcer you would have seen every punk in hockey trying to make a name for himself by taking a shot at #99.
No matter what, I think we both agree that hockey is the great sport it is because of the skilled players and not the goons. If rules result in more room for guys with talent to do their thing, then I'm all for it.