the only reason i can think that that would be a problem is if u are playing someone experienced and see's the blitzes coming. what u could do is set up the LBs and CBs or whoever youre blitzing every play but not blitz unless u need it. this would cause them to probably forget about the possiblity of a blitz and not block the hb or slide protect. so basically try not to make it obvious u are blitzing. hope this helped