the steering is more sensitive than older subies - i noticed it more after reading all the swaybar talk. if you are in the center lane on a 3+lane highway, the car should stay straight without input from the steering wheel. if it drifts noticeably so that you have to correct it, then it's probably alignment. if it's alignment, it will drift in one direction only. get a good tire pressure gauge and make sure all the tires have the correct pressure before anything.