How could you think the Atlantic Division is one of the toughest division in the league? The Celtics beat up on the competition last year and they have significantly improved.
The Knicks added Amare, other than that they don't have much to fear. They reconstructed their entire team and will take a while to gel.
The Nets may add Melo... But have to give up Harris and Turner to get him. A team of Lopez, Melo, and Murphy might be lucky to win 20 games next year instead of 12.
The 76ers were horrid last year, drafted a good young talent and made no significant additions therefore will still be horrid.
And the Raptors were a below 500 team and lost their best player without adding anyone significant or replacing him.
The Atlantic Division might still be one of the weakest divisions in the league at the moment. The SouthEast, NorthWest each had 4 teams go to the playoffs last year, while the Central had 3. While the SouthWest has 5 teams that, if the played to their potential (Memphis and NO) could also make it to the playoffs.