Gallant would be a good start.
Selling or buying doesn't make a difference. Watching the team make the same mistakes over and over again either means that the players are not smart. Which could very well be the case. Or the coaching staff is telling them to do things that do not work at the highest level.
Two defenders pressuring the same player and abandoning the front of the net all of the time is something I'd suspect the coach is telling them to do since that isn't taught at any other level. Same for having 3 or 4 players below the goal line defensively.
JC is fine if he is there to encourage the younger lads and hand out fruit snacks and orange slices but they won't win consistently - regardless of what the roster looks like - if they keep defending as a team the way they have been the last 3 years.
- fattybeef
The NHL is not binary. "Do this and you will be fine." If that were the case every team would play to a tie. Better teams make inferior teams look badly no matter how well they are coached and how smartly they play. Sorry, that's life.