There is virtually no measurement that suggests DJ or Mack are better than Jameer right now. He and DJ are both bad defenders at this point, but his offense was waaaay more efficient last year, not only as a shooter, but as a ball-handler/distributor, and that is going against starters more often. Mack is much better on D than either, but he's not a good offensive player, as he can't really shoot well enough and he's a turnover machine. I'll agree that Payton is objectively a better player by now, but Jameer would see 20min per night as his backup on this team. Easily.