what I meant - but I'm definitely not sure about this - is that if a player is much better in JS than JR, but forced to shoot a lot of threes, then his percentage will be worse than what's indicated by the match between outside attack vs outside defense ratings as well as overall shooting percentages.
I don't think so. PP100 are calculated ex-post, based on the shots actually taken in the game. Therefore, lower skills will cause a lower PP100, not vice versa.
Also, have in mind that a shot with a given percentage chance of going in will contribute differently to the PP100 if it's a three-pointer (.500 chance to score a 3 is 150 PP100, .500 chance to score a 2 is 100 PP100).
"I don't know half of you half as well as I should like; and I like less than half of you half as well as you deserve."