You clearly watch the Sharks a lot, but just as clearly, you don't watch anything else. You simply can't fathom a world where Celebrini isn't the best rookie, and I understand and applaud your commitment to your point of view. It's simply not accurate. Celebrini is having a great season by rookie standards, and his play has been impressive, but his play isn't moving the needle for his team. They're still bad, with or without him. Over the last 20 games, what Hutson is doing is at near-historic levels, and the Habs are having success as a team, with his contributions having significant impact.
Your speculation that Hutson is going to fade is just that, speculation. Hutson has been improving, not fading. The scoring pace might slightly favor Celebrini, but he doesn't have enough games left to catch Hutson if they both maintain what they've done over the past 20. The assumption that he needs to beat Celebrini in points is foolish, considering Calder winning defenseman rarely win the rookie scoring race.