I was talking about both and actually you can change what plays the CPU use. Just go to the playbooks section in rosters, select a play from the teams playbook and press A. You can replace the play with a number of different plays.
I just finished the playbooks for half of the teams in the league. I gave the Spurs some more high post plays for the PF (which I put Duncan at) and a host of different changes.
I should be finished with all the teams some time tommorrow.