Ran out of gas is a more accurate statement, a group of kids learning how to win but at least showing the compete level to actually get there, instead of falling apart under a bit of pressure.
Craig Berube wanted to play a conservative, somewhat defensive style, and it didn't seem to go over well with the core group in Toronto, which led me to believe they were going in a different direction. But they chose a low-event, defense-first coach, one who fans have mentioned has used a 1-3-1 style. I don't think I have heard much about that style since Guy Boucher was in the league.
I don't know your AHL coach, but it looks like you went off the board with a seasoned but somewhat underwhelming choice, and the reported scope of the search suggests it may be a surprise hire. Time will tell, I guess.
Your AHL guy has his team on the verge of winning the Calder cup and while I can't speak of his style, the results are great and he should have been considered for the position.