The attitude thing, for one thing, the sporatic play inside (especially receiving the ball) for aother, and bringing the ball upcourt for a third. The BACK.
I don't know about the rest of you, but when my body used to fail me occasionally (now that it does it all the time, things are different), particularly in ways that struck at the core of what I was good at, because of an injury, it was a real bummer. I can only imagine what it felt like to be out in public and be having that happen, especially when you have pro aspirations. I've said this before, the way Paulus handled his travails astounds; I marvel at the guy; a champion and leader without peer. I do not fault McRob for falling short of that mark.
I think that especially towards the end of the season, McRob needed to save his energy at times, and had to make sure that he was back on defense. Duke could not win with other teams scoring on run outs or delayed run outs. McRob needed to be back and ready. Dribbling up the court was a justification for dragging a bit, and a way of trying to be useful in the process, perhaps.
Getting the ball inside the defense to a big when he is on the move is a lost art, and one that Duke as a team needs to improve upon. If they do, the Zman will be the beneficiary. It seemed to me that Z has a nice sense of where the spaces are relative to where the ball is or will be, and that entry passes were missed. Worse yet, many were delayed. Delayed would get the ball to Z when he was often off balance, either having just been pushed to a defender who was recovering from having been beaten, or when he was pushing back.
I think a more mature exterior team will let those passes go in a more timely fashion, or at least I hope so. Paulus's ability in that regard, which he had shown the previous year to be quite keen, was, imo, greatly hampered by the foot. If his weight was wrong when he saw something before it was about to happen, he either had to arm the pass, or wait for his weight to right itself, which usually would be too late. The arm passes were often ugly, as all momentum comes from mother earth. Nature knows no other possibility.
So, if Paulus's foot heals reasonably well, and if Shuyer and Wilkins and DeMan and McClure improve their ability to get the thing inside, look for Z to perform much better and certainly diminish significantly his turnovers. Lang should also benefit greatly too. However, between Z and Lang, I see Z having the much better vision for where the spaces will be and thus the bigger upside as putting real interior pressure on defenses. On the other hand, Lang, if he develops an ability to flash catch and shoot, could be scary; you try to take that away, and there will be some highlights.