What difficulty are you on? Im using All Star with sim slider setting, and other than adjusting some foul sliders up for Over the back, Charge and Loose ball fouls, I haven mess with anything else and the AI is taking what I give them usually, occasionally its late in the shot clock, but some of that is good D too. I guess I did lower passing accuracy to 45 for more turnovers.
Adjusting shooting tendencies will help or it has int he past with the issue your having. I in the past would lower down both inside and close range, and what I took off of them I would add to mid,3pt and post shots. Then I would take off a little from dirve and add to look for post players as well.
That's how I in the past fixed the issue your having. I know with the Euro teams I have noticed a little more of taking down the shot clock, and was thinking about doing just what I said for when I play with thise teams. I thinkth ats just because of the Offense an defense IQ isn't as good as what you see with foreign players compared to the players in the NBA with this game.
Hopefully you find something that works and Im by no means a slider guru, but I do know on lower difficulties you do get stagnant offense sometimes with this game in the past, that's why I never play on anything lower than All Stars.
Good luck and hope you find a fix here on this site.