This website will renew your love for Madden. For those who don't know, adjusting the player/computer sliders, game speed, and substitution sliders will change the way you play forever.
It escapes the classic/awkward gameplay that comes from your usual pro/all-pro/all-madden kind of game.
Wonder why your frustrated with All-Madden? Computer sliders are up, and yours are way down. Yes, the difficulty rises; but at the expense of dumbing down your team to where Aaron Rodgers can't complete a 20 yard crossing route to Calvin Johnson.
Depending on what you want in Madden, you can have a slider set that makes an experience as close to a realistic game of football as possible, a challenging yet non-frustrating game, etc.
There are hundreds of user-created slider sets on that website, although they do take a decent chunk of time to insert and practice with.