How exactly do you know people like Segas game? Because you read positive posts in a forum devoted to the game itself?
Plus YES, the casual gamer will forget about the gameplay next year, that is why they are casual. This is what people are telling you.
Finally you expect the casual gamer to learn how to download a roster file off of a website to get real teams and names. Perhaps you haven't met the general public, try spending about 4 hours at any retail desk and then get back to me.
I'm sure Sega and Take Two will bank their fortunes on such grand logic. I can see the conversation now.
Rep 1: Crap man, we just lost the NFL and ESPN. How the hell are we going to move copies.
Rep 2: Don't worry there are at least a couple of hundred guys over at OS that think our game is the shiznit!
Rep 1: Yeah, but that is only a couple of hundred.
Rep 2: Yeah but they say everyone knows who we are now and like our game!
Rep 1: I'm sold, lets start production on it.