The entire Bills team is pretty bad on Madden. All the simulations have the Bills finishing with a losing record.
As far as ratings upgraded on a weekly basis, I don't think they usually have crazy swings, do they? If they increase Allen 1 overall every couple of weeks he'll be pretty good by the end of the season.
I think he he should probably be about an 80, with room to increase throughout the season if he keeps playing well. So I don't think his rating is super low.
He's on the nice list, so that's good.