The only problem with what you are saying Matt is that you can't really see Kronwall leaving his feet in 'game time action'. It was that close - to having at least one foot on the ice. we all have the advantage of seeing multiple replays at great angles - the refs do not have that DURING the game.
While leaving you feet is a penalty and I understand that - it was not called during the game. And while Shanahan does see it from all of the angles - he also took into account the delivery aspect of the hit and possibly the fact that I do not believe that Kronwall has ever been suspended for a hit.
As far as calls that should have been made - there are at least a dozen every game - but the refs even take the circumstances into account at times. Just refer to the Edler SH goal - he deserved a penalty for impeding Zetterberg's path to Hansen... but because they were short-handed it MAY not have been called.
While leaving you feet is a penalty and I understand that - it was not called during the game. And while Shanahan does see it from all of the angles - he also took into account the delivery aspect of the hit and possibly the fact that I do not believe that Kronwall has ever been suspended for a hit.
As far as calls that should have been made - there are at least a dozen every game - but the refs even take the circumstances into account at times. Just refer to the Edler SH goal - he deserved a penalty for impeding Zetterberg's path to Hansen... but because they were short-handed it MAY not have been called.