Last year, I was questioning of CJM's in-game stuff early, (his insistence of ignoring TOs and his burying certain players) and was mocked, until other people understood the concern, and it became a thing.
Last year, I was concerned in Dec, Jan February about the Celts intensity, focus toughness in the face of adversity and almost inexplicable series of losses in which they lost games in which they had late double-digit leads. I was called "reactionary" "chicken little" and told to remember the NBA is a make or miss league and it was just a game in January/Feb etc. Really good teams lose games like that from time to time, but not 5-6 in a season. Good teams learn how to win games like that in Jan and Feb by learning and making adjustments (both sides of the ball and bench) so they don't crumble in May and June.
Last year, I warned about the Celts inexplicable poor record in OT games, and late and close game. Games in which coaching adjustments were more important than they are in 20 pt wins. It made no sense to me why an elite team that was capable of playing .750+ ball, was . 300 team in OT. See the above comments for responses.
Last year, when the Celts after losing some games dropped from the 2nd seed to the 3rd seed,(Mar or April, don't remember) I joked the bright side was at least we would avoid Spo and the Heat in the 1st round, as I feared Spo would steal CJM's lunch. Good thing they didn't meet in the 1st round.
The Celts are a juggernaut, and a better more talented team than last year's team which IMO was good enough and had sufficient on-court talent to win a championship. But they have issues.
CJM has improved but my fear about his ability to coach this team to its potential remains a real concern to me.