I don't think the difference in the two games is necessarily effort, but there was a clear difference in Rondo's intention. What I mean is, in game 1, it seemed like Rondo wanted to be a facilitator and shot or drove as a second or third thought on each possession. Most of his drives and shots at the hoop were with the shot clock winding down. He also clearly dribbled through a lot of open looks waiting for people to get open. In game 2, he determined he was going to be the man and pushed out on breaks, took pull up jumpers, took the open shots, and aggressively drove to the hoop with plenty of time left on the shot clock.
If Boston is going to win the series (or even a game in it), Rondo has to be the player from game 2. He has to be that player next year as well. Sure his shots won't always fall, but Rondo needs to be a 25/8 type player rather than 11/12 type player. He absolutely needs to be more like Westbrook and Rose and less like Nash given the current makeup of the team. Sure if Boston has two or three elite players in its prime (as it has in the past), then Rondo the facilitator is probably what is best for the team, but right now the team doesn't have those two or three elite players so it needs Rondo the scorer.