Iiro Pakarinen getting it done on penalty kill, Mark Letestu not even close

When you watch dozens and dozens of hours of hockey replays each season, as I’ve done for a decade now, you realize that the hardest thing to evaluate is a player’s work killing off penalties. 
With the players essentially playing a zone defence with high emphasis on reading and reacting, it’s more difficult to ascertain who is responsible for what lane and checking what man. Was a player too aggressive or not aggressive enough? Was it his job to cover off that passin