I'm going to make bold prediction: Mesar will prove this year in the AHL that he deserved to be picked in the first round. In three years he will be part of the Habs and will be a valuable player, somewhat like Newhook.
Grillo will not be on the bench or any coaching duties for the players. He will advise Marty as a coach (MSL handling the PP) and other coaches as a full time consultant.