You say an on-court leader is missing and I would agree to the point that we don't yet know who it will be, but one will almost eventually emerge.
But a bit different than that, I think an Alpha player is missing. I see that as a bit different that an on-court leader. I see that as the player that can step up and be counted on to get us points at a critical juncture. Not just a guy willing to take the shot, but the guy that can create offense, create space and not only be willing to take the shot, but put himself in a position to make it a high percentage shot with a good chance of being converted.
Guys like Melo and JDubs during our the '03 run or '96 runs. Had Dion stayed, I think he definitely would have evolved into that guy and fit that bill. But, I am not sure that anyone on the current roster fits that bill at this point in their development. But, we'll see possibly MCW or DC, but both may be too inexperienced. I don't think Triche has the makeup for it, but maybe with the dawn of his senior season he'll be more aggressive in looking for his own offense.