I had a powerback on my team many seasons ago who had 10 in this SA. I used him strictly for short yardage and GL and to me I think it worked extremely well. You can see the dot move quickly when being tackled, when it fires. And he wasnt stopped often when called upon to pick up the short yards.
It works. Going from 0 to 10 one season to the next on my previous HB was noticeable when he was being tackled sometimes he fell like half or 1 yard further downfield.