If you're finding that your FG% is too high, simply lower your Shot Success sliders in the areas you would like to see a decrease in shooting percentage.
As for too few 3PT shots, try increasing the CPU Take 3PT Shot tendency by 1 or 2 clicks.
The Run Plays slider is under Options > Game Settings > Coach Profiles.
Trying to adjust for turnovers is like opening Pandora's Box this year. To get more turnovers from the CPU, you have to make some sliders too unbalanced and it makes the game too easy.
To increase AI vs. AI turnovers, try increasing Play Passing Lanes, Go for On Ball Steals, Hands, and the Steal Success sliders, depending on which aspects you would like to see improved.
You could try bumping these sliders up to Superstar, but for any of the Attributes sliders where the User has a 5 or 6 point advantage over the CPU, decrease CPU value by 1 so that the User now has a 6 or 7 point advantage (respectively).
I hope this helped you guys! Sorry I haven't been active lately, but now I'm in the process of buying the parts to build my own gaming PC, so I've been spending a LOT of time researching and price-comparing lately :/ Hopefully I can get back to this game soon!