I believe the team is fine for the playoffs.
There's no real drop off, in quality of play, if Garnett comes in, ~18 mins per playoff game. The big man body count is MM, Powe, BBD, and Perks. I don't see many teams with a similar level of depth at the 4/5 spots.
My only hope is that Starbury explodes for a major game or two, 20ppg - off the bench, and then our bench is virtually unstoppable with House/Starbury, as the best *backup* back court in the league today. Add two stars, Rondo/Ray Ray and then perhaps it's the best backcourt combo since the days of Monroe/Frazier.
Sure, we're a little weak at the 3, meaning Pierce's sub, but everyone else is weaker, all around, including the illustrious Cavs.