People undervalue the role of injuries in sports. Yes, the Big 4 have remained healthy to date, but their bench has been decimated all season. If Delonte and Daniels had stayed healthy, Perk would still be with this team and the Celtics would have the best record in the East.
Delonte, Daniels, Semih, even Wafer....not to mention the O'Neals. With any continuity at all on the bench, we'd be entering the playoffs favored to get to the finals.
They hung on as long as they could but losing your bench and then rebuilding it on the fly finally caught up with this team. They did fine in the regular season all things considered. Just not sure they're going to be able to get their act together in time to win a title. Right now this team is too soft and going to the bench is like rolling the dice on a nightly basis.