The AHL changed from their Clear Day roster where teams submitted the players who would be eligible for the playoffs to a deadline where players had to be on the roster at a specific time (2pm today) or the player can't play in the AHL playoffs. So, it's essentially the same, only teams have to make paper-only moves. It used to be they could just submit the names without sending players down.
Too bad Murray and Jenner couldn't play in the AHL playoffs to get more time on the ice this season. They could get hurt, but Murray's development especially is going to be hindered with the lack of playing time.