You make a good analogy but I still think you're focusing on the wrong player. It's all on Lin not Melo, how the offense runs. To use your analogy of the Celtics Big 3, it's actually the FOURTH player who made everything work, Rajon Rondo, and after he became more confident he noticeably stopped deferring so much to Paul Pierce (who has a Melo type game), and started distributing the ball as he saw fit. It's all on Lin to run the offense from this point.
BTW, WTF was ESPN thinking last night?