Might that have been a result of our continuity -- the same veteran starting lineup for a third year?
I don't think so. That starting lineup performed very well. The problem was that any change out of the starting 5 resulted in major chaos to our chemistry and production.
The fact that they performed well is the point. We could start off strong because we knew one another. It took time for other teams to catch up. But they did catch up.
Considering how many games we lost in the 3rd or with the starters on the floor in the 4th, I am not also not sure how changes were relevant. With everyone healthy, we haven't been good. I'm not sure there is a basis for saying we have a chemistry issue.
Perhaps Pierce's health could be a partial explanation too. KG, not so much since he was far from impressive when we started the season strong.
The Big 3 aren't so "Big" anymore. That's all the explanation you need for why our starting 5 is no longer the best in the NBA as it was the last two seasons.
Maybe it's injuries, or maybe it's just old age - or the former caused by the latter - but KG, Ray, and Paul (especially the first two) just aren't the same players they were when the C's won it all. This team was built to succeed when the Big 3 all play like All-Stars. Now that they aren't consistently playing at that level, the team isn't dominant anymore - the same gameplan doesn't work as well as it did.
Unfortunately, Rondo and Perk are still just elite complementary players at this point; they can't pick up the slack. Unless Rondo develops a jumpshot and a better scoring mentality, all he'll ever be is an elite distributor who has to be surrounded by stars to succeed. Perk is probably as good as he'll ever be.
Our bench is pretty awful, as well, which only makes things worse - which is perhaps the biggest surprise of the season, considering the off-season additions seemed so good at the start of the season.