in my opinion is hard to tell what a sports game is going to be like when playing a small sample and playing on a difficulty level that one doesn't normally play.
I agree, that the demo gives you an idea of what you are getting, but I don't feel as though it "misrepresented" the game. There is no online dynasty in the demo, there is no slider adjustments in the demo and there are no roster changes in the demo which seem to be 3 of the biggest concerns that the game has.
The robo QB/deep ball issue in my opinion is exactly the same as it was in the demo. Also, the kick coverage is exactly how it was in the demo in my opinion. That was one of the biggest criticisms of the demo was that it was too easy to return kicks/punts.
As for the pass rush issue, that issue was mentioned by community leaders and even addressed on this board before the game was released and even before someone got the game early.
Just my .02