If Hughes also did a regular pk shift he'd be playing 27:30 a game in Vancouver, and he already has the 5th highest ice time in the league. On PK big slow guys like Derek Forbot can be effective because you only need to play a simple game: hold position, block the shots, clear the crease, dump it out. As a smaller elite skating dman Hughes is much better utilized getting additional 5 on 5 time, it's not a matter of being "kept off the ice for PK" .