Maybe this should have been expected. New head coach Brad Stevens is feeling out both his roster and the NBA game as a whole. I'm sure the speed and rotations are somewhat different from his time at Butler University.
It is also incredibly difficult to gauge a player's true ability based on preseason performance. Sometimes, it will provide useful hints, but other times, it is completely useless and embellished due to game intensity and competition level.
It is up to Stevens and his staff to wade through that to find the little nuggets that will help him in the regular season.
It is up to us to continue probing questions that we want to see answered about the Boston Celtics.