It would have been nice to see them continue the run, but they didn't have enough time to win the game in any case. All Boston would have needed is two buckets to wrap it up.
This is the difference between the Cavaliers and the Lakers. Lebron scores under thirty, and they lose by twenty. Kobe scores under 30, and it's actually good for the team. That is about coaching, and finding ways to get the rest of the players involved. Coaching isn't the end all be all in the NBA (hell, look at the Celtics), but it is a great advantage to have when you do have it.
Whether it's Lebron the scorer, Lebron the facilitator, or Lebron the MVP who does both, they need him to be outstanding to win the championship. He really can't afford a night off when the "offense" runs through him for everything.