Out of the box it was still high by default. However when people started saying it was too easy to scramble with the QB on the demo, they ramped up the QB spy logic on their Day 1 update.
I guess this was ONLY to affect the cpu defense towards the Human player. However it also totally over ride the cpu QB scramble logic and the cpu as a whole real assignment AI run logic.
The 1st clue to this was seeing the RB leaning for no reason. Now the developers openly admitted they broke the lean animation logic with that day 1 update. And it took them two patches later to fix it.
Now you have stop and ask yourself. If the lean logic was broken and it is part of the cpu run logic as a whole, doesn't this also mean other parts of the running logic got broken as well ?
However they never looked into this because as you know the whole dynasty progression thing was totally broken as well. And when they fixed that in their 3rd and final patch, it broke the running lean logic again.
So in a nut shell.......This year they had 3 patches that pertained to containing the QB scramble logic and 2 of those patches also pertained to the real assignment AI logic.
With all that PLUS over hauling the dynasty progression logic to actually make it work, it just broke the logic code cause and effect.
Editing rosters is just trying to restore that cause and effect balance.
One must look at all the different attributes as a cause and effect switch.
Each one on offense has one of defense that balances it out.
The key is to just find the right balancing act. Does a low play recognition make a player play dumb ? NO
All that attribute does is list the priorities for that defender. Which is either to stay at home or go after the person who enters your space and shadow them.
Stay at home = Spy the QB and pay attention to nothing else but the QB
With the PRC being so high combined with their patches of ramping it up internaly it made DE's, Line backers and safeties Spy the QB all game long.
Which is why the defense very rarely got faked out by anything and instantly went after the QB. They always blew up read runs, counters and play action passes.
If you put it on 50, the defense will get faked out at least half the time, but more importantly they will make their coverage area their main priority and not the QB.
Zone coverage does work IF you raise the attribute for the line backers. Because by default a lot of their ratings for zone is in the 50s and 60s.