I don't know regarding Sacco. I do know upper management has to do their due diligence. If the right coach is available they definitely need to make the change. But in the meanwhile let's consider a few things
I'll give Sacco credit for the mess he inherited. It was obvious Montgomery had checked out and it appears some of the players did too - which I think contributed to much of the lack of urgency and lack of second, third effort - too many players going through motions.
A coach can have a system, work on positioning, team structure, but if the players don't execute on the ice there isn't much that a coach can do. That falls on the players.
Now, not as an excuse, but the Bruins have stayed along the fringe if the playoffs despite not having Hampus Lindholm and Charlie McAvoy for much of the season.
The Bruins have lacked offensive forward depth having to often work three times as hard to score goals.
The biggest positive under Sacco is the emergence of Geekie, with a lot of thanks to Pastrnak coming alive, but also having somewhat stable line combinations.
Now considering what I said above, some have said the team needs a new voice ... BUT what if it's not the message but the ears hearing it that need(ed) to change. Again, on ice play and execution falls on the players.
I've watched the players body language, their demeanor, and their emotional commitment level all year - and something has been off. The biggest change I saw yesterday at the game with Bruins player personnel was - hustle.
Example: Previously, during line changes Bruins players would mosley over to the bench taking their sweet ass time. I've seen turtles crossing a road quicker than some Boston line changes this year.
During that game against Tampa I was really impressed with the execution and how quickly Boston changed a five man unit on the fly and right back into position and the action. Really, I was wondering where has that been all year. It was a thing of beauty. A small thing, but very telling.
Some might consider that a small thing. But, if players don't want to commit to the little things, they won't commit to the big things. Now, it might have been adrenaline, or new players wanting to impress, but there was a new energy with the team yesterday that has been missing all year.
I say all that because, I don't know if it's been the coaching or if certain players had simply checked out happy and comfortable collecting a paycheck. As far as coaching, I think their fate will be determined more so by team commitment, how it competes and executes, more than win/loss record to finish the season. There were no passengers yesterday, everyone was engaged.