Personally I've enjoyed it a lot - to the point where I've stepped up to the big boys table in pro-10. It's improved my game no end, to the point where I took the Browns at 69OVR to the SB offline on All-Madden. I don't think my wife is that enamored with it but hey-ho. Although as I went back to uni, I've also got more time to put to it.
The admins etc have done an excellent job (apart from that 49ers trade booo) @Vondia and @SnapDan were instrumental it keeping me going with the Browns early on and I'm pleased they did.
My only gripes are on organising games, too many occasions when someone has said yes I'll play and then vanishes or says they'll go on AP and they haven't. Beyond that some of the rules annoy me, notifying on hurry up and not allowing 4th down fakes specifically. Oh and the FA routine - I think it should just be a case of first come first served in the game. If you miss out on the player you wanted, tough titties - thats life and that's what happens in the NFL. Pre-season as well annoyed me, I want to play pre-season games because I want to try different looks, schemes, plays, players etc and you can't get that in training mode or playing offline but others seemed to totally drop it.
Maybe bring in an owner league? that could be interesting. Maybe set up an FB group? The forum is fun but with different layers etc you can miss out on a lot,