Hard to say how much the shortened season, no training camp, etc hurt them. Also wonder if KG is just mentally gone after the whole melt down during the negotiation, etc.
They are both useful players, just not the two best players on a championship team like they were number 17 was won. Ray Allen is more or less the same and Rondo has improved, but KG and PP have fallen far. Without adding an elite talent, I cannot see this team winning a championship, i.e. less than 10% chance that we make the playoffs AND KG and PP are elite enough games in the playoffs for Cs to get 16 wins.
To me the strategic question is: how do the Cs get another elite talent? Nothing less gets you a championship, so why make an emotionally painful trade unless it's moving in that direction. Trading any of the big 4 would be.