Play calling/signals/confusion--why is it so difficult?

My point has nothing to do with plays. The plays called are working just fine. What I don't get is how much of a struggle it seems to be to get the play called and relayed in and then called on the field.

Even with new coordinator, terminology & formations, getting the play in can't be this difficult. The players and the qbs obviously know the playbook, so that isn't the problem. There is something wrong with the method of relaying the plays in and it will cause a problem once the team gets into league play.

Honestly, I had begun to wonder if our Qbs weren't just dumb. But that isn't it. Sims and Coker both stare at the sideline, eyes going wide in confusion, like everyone signaling/yelling at them have suddenly started speaking ancient Latin.

I think Kiffin was a great hire, but I hope they figure out a better way to get the play called before it cost the team in a close game.