I've been debating starting a thread on this, but just really don't have the time to "host" one...
My experience:
I set those Scheme "styles" to the way I thought I wanted my players to play and it was "negative help"
Then:
I set my depth chart
Went to the Progression interface to see what "styles" were assigned by EA to my starters / backups
Went BACK to Scheme and mirrored the default setting to the scheme
Effect:
BOOM
All my players played better and smarter when their default style was mirrored in the Scheme section...
Best example:
My TE is "receiving" at default...I mistakenly set him to "blocking" to get some extra attention in that regard...
His play was awful...seldom ran a decent route and had open passes bounce off his helmet...
When I re set his Scheme style to receiving, he now is often open and catches almost everything...
It's a huge difference to "Scheme" to your existing lineup...I even tweak for injuries that make a second string guy start who has a different default "style"...
Here's the Big Bang (part of this) Theory:
Because six of my Bills are set at default style to play some kind of run D (4-3 Run D at LE / Run Stopper at RDT / OLBs AND MLB set to "Defend Run" / CB2 is "Run Support" with DT1 set to "Balanced" I'm GUESSING the CPU playcall AI "senses" I'm overloaded personnel - wise to stop the run so...
THEY PASS MORE...
I played my Bills v Jets twice with setting that sought to make my guys defend the pass and the Jets ran 80 percent...
I switched to "mirror" their default run based setting and the split was 50 / 50...many passes on first down / playaction / screens / Wildcat...
Completely different gameplan...
What happens if you try and "force" the CPU to pass by setting your defenders to "run" based styles when those aren't their actual styles?
I don't know...
This could be a huge development in any event...
I know "mirroring" helps overall gameplay...
Just not sure if / how it changes the CPU gameplan yet...
Have at it, gents!