I see nothing to suggest that a team that won 62 games without KG for 1/3 of the season is going to decline by 8 games, especially after adding two legitimate players like Rasheed and Daniels.
The only player we lost is Powe. We've added Rasheed, Daniels, and most importantly, KG. That should be enough to win 60 games, even if the team cruises a bit in the regular season.