This game was destined to be like this with the substitutions. We just added 3 players to a group that already has very little separation between starters and bench players in terms of talent. The Celtics don't know what they have yet in order to set rotations that maximize their abilities.
Doesn't mean I agree with all the sub patterns going on but also hard for me to criticize, this is not an easy one to coach no matter who the opponent is. Would like to see more of a focus on Kelly though, considering how well he's been playing as of late.