Wow... somehow CP3 has become god... The guy averaged 15 points as the number 1 scoring option on his team. Rondo shot the same percent from the field and got 10 points as the 4th option. Is CP3 a better scorer than Rondo yes by about 5 extra points every game. Rondo has more assists so that makes it about 2.5 extra points per game. Rondo probably gets a little more back by his defense. Rondo has more turnovers so that will mean less points. But adjusted for pace which inflates Pauls stats a little, the difference is negligible. So overall Chris Paul will get you a couple extra points... for an extra 7-9 Million in cap space.
Also the way the teams play defense on Rondo, they prevent the drive to the basket. They sag off him and actually make it more difficult for him to get assists by 5 on 4 on the defense. That's why Rondo doesn't attack as much as people think and have as many turnovers. CP3 is mostly double teamed which means he has a wide open David West, Trevor Ariza, or Okafor for assists. Rondo has to work hard to create his assists because it's much more difficult for someone to get open when the defense is playing 5 on 4. Chris Paul has to work harder for his points but gets easier assists.
Even Hall of Famers score poorly with an extra defender while wide open "role players" can be very efficient.