1) Let players use Dynasty mode Online... give us ability to export and continue with the stats (kind of like in the older Madden) all in one giant dynasty mode that everyone participates in.
2) Create servers for us to play on that are lag free.
3) Add the ability for people to watch the game while sitting in the crowd (since it would be on a server).
4) Use the new technology seen in games like Shadowbane where you can record the games into small 5mb files that can be viewed in-game only (they aren't AVI, MPG type movies.. but they "record" the movements and redo them in game).
I would be willing to pay a $10 monthly fee for online play if they added the Dynasty Mode and Servers to play on.
If none of the above.... Improve online play in terms of lag! The game has plenty of lag issues and the most annoying one is that usually only ONE person lags (gets some weird button delay) and it makes it unfair to them.