My main problem with that is that you've looked at total pts when seeing what we've lost, but then when thinking about replacements you've looked at ppg. The issue is that those players will not play in all 82 games. You also need to adjust for expected games lost to have a realistic scenario.
Rubio isn't going to get 9 assists per game if he hasn't got anyone around to put the ball in the hoop. I really hope he and Rudy develop a strong understanding in training camp, could be awesome.