The Mavs need a post presence desperately. While we did beat the Spurs and Suns these teams weren't at 100% and we were.
We need to be significantly better to win it all.
We also need better perimeter defense and better passing. Mavs had the lowest assist average in the league last season. No team with the lowest assist average has ever won the championship.
Ironically.. if not for the refs the Mavs should have beat the Heat in the finals.. but we wouldn't have beat a healthy Suns or Spurs team to get to the Finals.