The Cavaliers are infinitely better than last year. We'll get to their win total in a minute.
The Bulls are going to be roughly the same team as last year, assuming Rose doesn't come out as prime Rose that none of us expect. They may get some added production from Gasol, and their defense as always will be stellar, but they are probably nothing more than a 50 win team.
The Wizards got worse in my opinion. People don't talk about it, but Ariza for Pierce is a pretty huge downgrade. Pierce couldn't even play SF anymore last year, and now he's expected to be the #1 SF for the Wizards. Sure, Wall and Beal are great, but are we going to assume that Nene and Gortat are going to continue to be their dominating self now that they are getting older? There is plenty of room for drop off there.
The Bobcats are significantly improved. If they get better shooting from guys like Gary Neal, Kemba and MKG, then they are going to win a lot of games. I think they'll be better than the Wizards, personally.
OTOH, the Pacers are significantly worse. Losing Stephenson, losing PG, and having to rely on guys like Hibbert and George Hill to carry the offense...yikes. Fringe playoff team in the decidedly weak east.
Nearly every other team in the East is either too fringy to discuss, or too bad to legitimately discuss. I do, personally, think that the Raptors could be somewhat of a factor, but that's going to have to be solely from individual improvement and that's going to be tough to predict.
As for the Cavaliers, their offense should be record breaking. Too many weapons, too many unselfish players, and too many great passers not to average a lot of points per game. Defensively, the Cavaliers have a few specialists but nothing too great. They're obviously going to have to outscore a lot of teams in the NBA while getting a stop every now and again. Again, should not be a problem, even if the Cavaliers end up with no rim protector. I don't think the Cavaliers will break the mythical 70 win plateau, but they probably should break 60.