I'm extremely uncomfortable with this line of thinking. While the vast majority of goalie coaches are extremely bad, and actually do a disservice to the goalies they are attempting to "coach," I don't think we have enough information about Andrew Allen as a coach. Ullmark had poor balance and was practically a "stand up goalie" (to the extent such a thing existed) back when he was drafted. His game has, very clearly, evolved for the better. He's not perfect, of course.
A game like this is a fantastic learning opportunity for Ullmark. *WHY DID YOU FALL OVER?* I'll agree that Allen needs to be fired immediately *IF* he isn't addressing that specific question immediately. But, TO BE CLEAR: I'm not talking about just ****ing dressing down a pro athlete. What I'm saying is, a proper coach asks, "Why did you fall down?" and "How do we fix that?" "How do we play this next time so that you don't give up this goal?" "What did you see? What did your body do in response?" "Was that reaction right or wrong?" "Why?"