Its tough not to think that anyone predicting less than 30 wins for our current roster going through the entire season is writing what they want to happen as opposed to what they expect.
The team last year won 25 games and Rondo only played in 30 games, with a number of those being on a minutes restriction. If he is even an above average player, having 50 more games out of him should add a few wins.
On the rest of our roster, adding Young and Smart should be worth at least a win or two over the course of the season. They are both raw players, but have talent and should be immediate improvements over the D-League players they would be replacing on the roster.
We have also added Zeller, who may just be a backup level NBA center. However, even a backup level NBA center is better than the D-League and non-centers we were forced to play last year.
Of the rest of our team, Sullinger, Bradley, Oly are clearly in the part of their career where they should be progressing as players.
Bass and Green should be about the same based on their age and game.
Our only Rotation loss will be Humphries. I really like him, but I don't think it can reasonably argued his absence will offset all the above improvements.
So thinking all that over, how in the world does our team not improve?
Lastly, some have made the argument that the East is dramatically improved. I don't really understand this sentiment. The players just moved primarily within the conference. Yes Cleveland is better now, but Miami is worse. Chicago may be better, but Brooklyn is worse. The only new "impact" player from the western conference as of now is Paul Gasol, all the other players just switched teams within the conference.