I said "in game" not "halftime". The second half is for evaluation of backup, bubble and younger players. Making halftime adjustments wouldn't be a good use of coaching time, as you just want to see if the young guys can execute the fundamentals and there is nothing at stake. That's not to say that the coaching staff should have the night off completely. There is a value in trying to counter what the other team is doing to you, be able to get in different sets and packages. It helps you know your own weaknesses and what to work on.