By not running plays, the coaches got to see the natural tendencies of the guys together on the floor in a game situation. In trying to run an up-tempo offense you have to be able to coach your guys on how to play when there's not a play called just as much as when there is one.
Put them out there, let them play, and see what they do on their own. Then you see their team strengths and can game plan around that. You'll also get to see what weaknesses they have as a group and can coach them up. Let the guys' natural tendencies guide the game plan and play calling rather than trying to ram the guys into a system that isn't right for them. You just have to figure out what those tendencies are.
It's an exhibition game - it's meant for building confidence and chemistry and as a way for the coaches to gather information on how their team will perform in a game situation.
Are you trying to insinuate that the game of basketball should be free-flowing and fun? Blasphemy!!!! Only totally structured BB allowed in today's world. I want the coach to tell me when I can take a ****.