I think people forget that once Porter was fired and Gentry implemented a more modified offensive philosophy, which tried to integrate both Shaq and Nash's strengths (Seven Seconds or Shaq), the offense ran beautifully. Hollinger, based on his statistical analysis, even submits it as perhaps the most efficient offense of all time.
http://sports.espn.go.com/nba/columns/story?columnist=hollinger_john&page=PERDiem-090317
(Exciting side note - notice that this offensive efficiency was coming even without Stoudemire)
The problem wasn't having a powerful, post presence. If anything it gave us more offensive options and firepower in this integrated system. The problem was that powerful, post presence (Shaq) could not play effective pick and roll defense. So, I believe the real question to pose if deliberating whether or not Jefferson would improve this team is
can he play effective pick and roll defense? Offensively, I like the capability he brings us.
