They can play. But they need an adquate point guard or a a new system, like the triangle offense.
To the OP, I see what your saying. They can play well together but it hasnt been consitent. genrally in blowout wins they play well together.
But the only game this year i felt they played well together was the Miami game. Melo had 29 points, STAT had and very efficient 16 pt 10 rebounds per game performance.
Here's the thing about about having superstars. They are a gift and a curse. Whats makes them good, espcially as young superstars is that they belive in themselves so much. At the same time it hurts the team game. But we all know multiple stars are needed to win.
This is where coaching comes in.......Can you make these pieces fit. Can you tell these superstars where gonna do it this way.
Great coached need great players, Great Player need great coaching (not necessarily an already great coach).
Lets see how good MDA is.......