Welcome aboard
All GMs have a shelf life. Personally, I think JBB has two years left at this current rate with UFA, TDL, resigning, draft and.first round exits until his seat is warm or he's let go. I believe Cooper is actually safer than Brisebois. Vinik probably views them as a tandem and has confidence in both.
As fans, I think the failure of Jeannots trade to yield any resemblance of a "wow" factor as a player on this roster really hurt the then perceived overpay it was the moment it happened. In 75 regular season games, not outperforming Mitchell Chaffee or Gage Goncalves to the point where people are like "we need Jeannot in the lineup," is troubling. I'm not going to continue to beat that dead horse.
Compound that with back to back first round exits, there's definitely, DEFINITELY, multiple expendable players on this roster. The issue is that most of them were all JBB signings or trades. That's the problem. Will he swallow his pride and move someone like Jeannot so soon? Unlikely. Is he moving Sheary? Maybe. Dumba and Duclair cost us Thompson and a pick. That's the risk with rentals, as neither should be resigned. The 3 resignings all have their legitimate critiques. There's a lot Brisebois has done that's good, but we are slowly placing chips into the pot of what he's done "bad," or at least, has turned out to be mediocre. In the end, he didn't know how useless Sheary and Jeannot were going to be, but when you're the GM, you are the guy. You get credit when things go right, you get the blame when they don't.