I think Miami should be reasonably happy about where San Antonio's offense is.
The Spurs only really have Tim Duncan going. Haven't been able to establish Parker or Ginobili. Their shooters have been kept at bay for the most part.
If I were them, I would be happy taking my chances on Tim Duncan trying to beat them by himself on offense. I doubt he has the legs to keep this up for the rest of the game.
I think Miami is going to get a big chance here. They gotta get their own offense together though.