Playing as the Warriors, I hold opponents to 40-45 percent most games, usually closer to 40. David Lee had a decent night defending Duncan, just like real life last night. It's actually almost too easy and I probably have to adjust midrange because of how money Curry is.
A lot of it is just preventing penetration and keeping them away from the basket with position and L2. Once you start jumping at everything, it's game over. That's somewhat realistic and part of it is just a problem with the game engine and interior defensive contact.