When it comes to QBA I have found that the only solution to make QB's less than pinpoint accurate is to edit individual QB ACC rating. Now this is a rating I can GUARANTEE you works. Go edit a QB's individual ACC rating to 0 and go and try to play with him and see what happens lol!
Basically what I have done with my QB's is given them all 100 AWR so that they will have true pocket awareness and I've re-edited their QB ACC rating. I also keep the QB ACC slider at 100. What you get is a variety. QB's with lower ACC will be all over the place and QB's with higher ACC will have higher %.