I think this is dead on, and think it even goes beyond the offense. The team has an identity crisis in general. They seem to be stuck between thinking they are still the same team that won it all in 2008, and realizing that team is gone.
The core of this team has completely changed since 2008, despite the fact that the names are mainly the same. The clear cut 3 top players in 2008 have declined significantly, while other players (Rondo, Perk, Davis, T. Allen, Daniels) have improved, and added to their repertoire.
I think if the team is going to be a contender, regardless of trades, they need to come to grips with what they are, what their strengths are, and what their limitations are...because I get the feeling, they have not all come to grips with the fact that these have dramatically changed (and Doc is one of the worst offenders).
There is still plenty of time to get the chemistry right, but until they get over this identity crisis, this team is going to continue to underperform, and look like mismatched pieces, that never find any consistency.