Most of the guys who get the assignment for the deep wings have been BJs on 5 man crews so again are generally use to being deep.
Wow. That statement is quite troubling. Working a deep wing is nothing at all like being a Back Judge. Where do I start? Keys are obviously different, and the deep wings simply must know - and observe - their keys, and know when to come off their primary keys and observe something more important. Fading along a sideline is WAY different than how a B fades. Dead-ball duties are very specific and different, like closing into the field pf play when the ball is dead. HUSTLING into team areas to escort opponents out. Then making sure opponents are separated. Then getting a replacement ball (when needed) and hustling it into the U. Hustling back into pre-snap position. Keeping sideline areas clear. Counting defense EVERY DOWN, and signaling B. Getting to the goal line BEFORE a BC crosses. Taking progress between B-2 and G. Switching to GL mechanics. F getting under the upright on FG attempts - without fail. S moving to second U on FG attempts - without fail. Knowing what to look for on Kickoffs. And a lot more.
That is not to say that folks with quality experience at deep wing positions can’t move back and forth between B/H/L and deep wings. But, to simply move a B with no practice or significant experience at deep wing to a deep wing position, and expect complete and proper coverage and coordination is simply —— well, not realistic, I’ll just say that.
It ain’t that simple. 7 is better than 5, if folks are trained and experienced. But, it can be a disaster if folks don’t know what they are doing.