I'd say it has more to do with match ups. We've got four guys who could have a match up advantage on any given night, which would explain why we don't really have a true number one scorer, even though Pierce is our leading scorer.
Perhaps.
I think the team does have an issue, though, when it's really difficult to say whether Rondo is going to go off for 30 or go scoreless on any given night.
Scoring isn't everything, but you need to be able to rely on your supposed "best player" to produce in that area with some consistency.
The fact that Rondo has fairly consistently high assist totals definitely makes up for the huge ups and downs in his scoring, at least to an extent. The problem with that, though, is that because this team's offense is built almost entirely on jumpers, Rondo's ability to run the offense and stack up those assists is really dependent on whether the shots are falling.
In other words, Rondo is great at creating shots for others and finding guys when they are open, but with this team's personnel, those shots still aren't often terribly high percentage ones.
That's why it's important that Rondo remains consistently aggressive offensively in each game, looking for his own shot at least some of the time to keep things more balanced. Rondo should be taking 10+ shots a game.