Some of us have talked about this before. The basic idea that you want perimeter defenders and that not having them affects you interior D can't be debated, even if guys like Baker or Sasha are not the final answer.
If KP is guarding good stretch 4s and opposition guards are getting into the paint his man will get an open 3 on the kickout or KP will get beat when his man takes the pass, gives him a shot fake, and drives. He's been conditioned to look to the interior, and opponents seem to penetrate at will against us, and he gets hurt in these situations. Besides the points you also have to worry about the fouls he or Willy pick up
This is why I'd be looking at Fox and Ntilikina if one of them is available. If we can't get a PG with a rep for D, I might look to another position...
I have not seen much on Isaac, but he might be someone to consider as a future replacement for Melo if the two PGs I prefer are gone, assuming that he can play the 3 in the NBA. Needs to get stronger, but he seems to have a nice skill set. If he can play D at the 3 he might be a potential pick for us.
EnySpree: Can we agree to agree not to mention Phil Jackson and triangle for the rest of our lives?