For a 39-27 team, the Boston Celtics had several weaknesses that were easily exploitable last season. Unfortunately, they didn't do a great job of addressing those issues this offseason, so it's likely to see the same weaknesses appear in 2012-13.
Now, don't get me wrong here. The Celtics were a strong all-around team last season. They took the Miami Heat to Game 7 in the Easter Conference Finals, as they were able to overcome their disadvantages and play well.
The Heat were clearly the more talented team in that series. In the opinion of many, the series never even should have gone to Game 7.
The Heat's inability to take control of the series was mostly because of their inability to exploit several key weaknesses of the Celtics.
That's surprising, as strategies to exploit these weaknesses should not have been all that difficult to come up with.