Good coaches treat players fairly, not equally.
Malkin, Crosby, Letang, etc. will have longer leashes. Rodrigues wasn't producing on L1, but he largely wasn't making a litany of mistakes or looking disengaged. He was just above his talent level.
Kapanen can occasionally look disengaged. He's a player who needs to play with energy. He did that early on. He's been a bit out of sorts the last two or three games. A simple message for a player still relatively new to the team is fine.
Bet he's right back on L1 next game and given a chance to show the message sunk in.