Save for Del Zotto, all are entirely different situations than what Miller is facing. Sauer, McD and Kreider were all 21 or older before seeing NHL action. Miller is still a teenager.
Del Zotto played his way onto the roster and filled a huge need for this team. He was tremendous. If Miller can continue to play the way he played before last night, they would likely find a spot for him. If he can't, they'd probably prefer to send him down before his confidence gets ruined.
Miller fills in a bit hole too. Our 3rd line center hole.