The main things I hate about franchise mode (besides what I already commented on) are that there are some random games every season where your defense just can't tackle for shit. The CPU will have a guy that breaks 3, 4, 5 tackles and goes for a big gain. WTF, Madden?
Also, my QB can be an outstanding passer but it seems that there are a few passes every game where he is not under pressure and just completely misses a wide open receiver.
You can't buy happiness. But you can buy beer. And that's pretty much the same thing.