I have not given up on Mazzulla just yet. I think last season was a tough situation the way that Udoka got fired (suspended) and Joe took over. I see improvement this season so some credit goes to the coach and some to the players. There are still problems or weaknesses also, again, some due to coaching, some due to players.
The big picture to me is 9-0 at home, 6-5 on the road. Can't be much better at home; on the road, we are 8th best in the league, the best road record is 7-3 (CLE, MIN, OKC) so the Celtics are not that much worse than everyone else on the road, but we are also not playing to the full potential of the roster.
What worries me is that right now, our 3PT shooting on the road is 32.6%, only ORL is worse. Our coaching scheme is shoot more 3s. Not surprisingly, we shoot better at home than on the road. The Lakers won last night only taking 13 3PAs. The Celtics average 43 3PA.
The Lakers roster allows for LeBron to take it to the hoop often and Davis to post up often. That offense is going to work about the same home or road (+/- a few foul calls). I don't think Mazzulla is a bad coach, to some extent our guard heavy line up forces us to take more 3s, but I don't like to see this much reliance on the 3.