It's been talked about many times, but since it keeps happening and it's so glaring it bares repeating:
The Celtics, time and time again, give up late-game leads because they are forced to rely on jumpshots late in a game and they miss a lot of those shots due to tired legs.
The Celtics desperately, desperately need an honest to goodness inside option. A guy who can post up and score 1-on-1 in the post, even when the opposing defense is clamping down.
In the absence of a superstar 1-on-1 scorer (e.g. Melo), the Celtics need an offensive option like that if they want to be able to hold leads late in games against the best teams.