As a year round Madden player let me caution you about a few things:
XP--It's killing franchises. Both single user and league play. Once your a few seasons in the user teams are stacked while any CPU teams (or even user teams who typically lose) are way, way behind. The CPU AI can't manage XP any more than it can manage it's own roster. It's the rich get richer while the poor get poorer x 10.
Meeting weekly/season goal to earn XP: In user leagues guys are more concerned with meeting goals than sim, sportsmanlike play.
Practice-An absolute killer. The CPU doesn't practice so it doesn't gain XP. This leads to problem #1.
At the end of the day, EA is EA no matter the sport. Madden users will tell you that all of these things need a complete overhaul.