I get the central argument here is about the coach designating roles for the players.
With the Celtics being so inconsistent at times with their game--sometimes passing for the best shot, sometimes bombs away from the perimeter--you wonder about roles. Everyone seemed to have the green light to throw up a 3. Was there a designated protector of the paint? Maybe Baynes, when he wasn't hurt.
The strength with the old Celtics is everybody knew their roles. In the Auerbach days, Red tailored roles to the players' strengths, and he made sure the team talent was diverse. I will say this: the Celtics were primarily an offensive team before Russell. And they were constant bridesmaids. Easy Ed Maccauley was their center. Easy all right, defensively. When Russell came, his role was Secretary of Defense, and they became instantly unbeatable. Similarly, the Cowens-Havlicek, White etc era, and also the Parrish-Bird-McHale era. In the latter, the Celtics had a fine 2 guard named Danny Ainge, and he and Bird were the designated 3P shooters.
I'm not sure about roles with the current Celtics. That's one question I would like to ask Tommy. But I get the impression they have nobody who has any sort of a role inside.