For me, the only reason to trade PP and his expiring contract is because the team's 2 best scorers (PP & Green) play the same position. How you can you play them together so both get 30+ minutes a game and both are in to close-out games? PP has trouble covering guards and Green doesn't rebound well-enough to play PF. Is Green quick enough to cover guards?
If it works playing them together, then a lineup of Rondo, KG, PP and Green with Bass/Sully at the 4 and Bradley & Jet coming off the bench is a darn good one. Needed to be added are a center who can give 15-20 reliable minutes and a veteran journeyman pt guard. It might require trading Lee, Bass or Jet to get those players.