After a week of gameplay, another suggestion (that has been echoed a bit in the game threads):
More detailed play by play that is the reflected statistically.
For instance, instead of "Chris Johnson runs for 8 yards" it could be "Chris Johnson runs off tackle left, breaks a tackle from Dont'a Hightower; tackled by Adrian Wilson"
You just learn so much more about how to deal with that play. And it can then be reflected in the stats with both a missed tackle from Hightower and a tackle from Wilson as well as a few yards after contact from CJ.
Instead of "Cam Newton (pressured) passes incomplete to Andre Johnson" you could have "Cam Newton (pressured by Gerald McCoy) throws to Andre Johnson; pass broken up by Tarell Brown". Again, more knowledge as to who did what and how. It would greatly improve gameplanning.
I know it will probably be insanely difficult to program, but I do think you're marketing to a 'Madden' audience here and frankly that crowd is a little spoiled. I think that's what you'll need to get this to be commercially viable.
If you can't draw a crowd, draw dicks on the wall.