What are you trying to say?
At the small college level, the safety factor and substitution issues are apparently enough of a reason to have the U in the backfield. However, I have seen the occasional club football game with the U in the traditional position.
I'm a BJ in college, so I have no dog in this fight. All I am saying that it is not.necessarily true that the U in the backfield will miss dead ball activity, as opposed to when the U is behind the defense.