The addition of Nash changes the dynamics of the Lakers. Example: In the exhibition opener against Golden State, Nash swung the ball down to Kobe Bryant, who fired it into Pau Gasol, who was wide open for a dunk. It might have been the easiest basket the Lakers have had in years. A lot of easy shots will ease the wear-and-tear on the team and help prevent injuries.
Howard's back injury may keep him from assimilating into the offense right away, but the Lakers were more than willing to accept the short-term concern about his back in exchange for the long-term concern about Andrew Bynum's knees.
You can watch the conversation in the video above.