How about making potential a hidden stat and giving us more stats to play with 3 physical stats and 3 positional stats, awareness as an overall stat and finishing with injury.

Example Ron Stevens RB Speed:C Agility:C Strength:A Power:B Evade:D Carry:B Awareness:B Injury:B now this player looks like an amazing power back, overall 82 maybe but his potential is a C- and he stagnates as a starter and drops 2 points... Next year he recovers a little and rebounds with 3 points.

This brings my next feature. Instead of just aggressive and conservative game plans add Run with game plans power and finesse and pass with deep ball or west coast.

Power run with have shorter yards and less fumbles but RBs won't have amazing seasonal stats unless they are power and strength back, same with evasiveness and agility for a finesse run game. Similar for pass game and then the aggressive/conservative play calling will modify those.

Defenses could work on a similar setup.

On my cell so forgive any run ons and typos.