Player roles similar to what they had in madden 07 like "Franchise QB"  "NFL Icon" "Fan Favorite" "Team distraction"

Moral effect re-signing of players.

Advanced stats.  Madden is the only sport game with no elements of advanced statistics.

Contract restructuring and holdouts

Complete overhaul of the injury system where everyone doesn't get the same 5 injuries and guys with 99 injury rating isn't missing 6 weeks a season.

team and player tendencies....every team shouldn't be calling the same 10 plays against you.  A Big arm QB shouldn't be throwing nothing but dump offs.

Making the gap between bad QBs and elite QBs wider....a QB with bad awareness and accuracy shouldn't be Aaron Rodgers.

More realistic draft classes....speed backs shouldn't have great agility but no elusiveness, no juke moves.  Lineman shouldn't have 78 strength

Regression and injury could benefit from a development trait like progression.  Not every position should regress the same way.