Players tend to get on hot streaks and cold streaks:
I propose that there be bonuses and penalties to players (minor ones), based on their play. If a player gives up 5-6 lay ups in a row, he's going to somewhat lose confidence in his defense, and either foul more, or give up another easy lay up.
On the other side, if he is mentally strong from either experience or being clutch, he would lock down and fix it.
3pt shooters, will feel a rhythm after making a few shots and then it's like they can't miss, and on opposite side, if they keep missing they have a hard time taking the lid off the basket.
I just think "hot" and "Cold" streaks for players would add some element to the games.