I am taking delivery of my F this Saturday. While I don't have the issue you speak of with the seats, I also had questions about snow and handling things. The problem with your question and mine is that this car is so new that people seem to have little experience to get an accurate answer. I will say that with the Infiniti's the seats did not change their tightness after three years. Your dealer should be able to tell you if they can be adjusted. You definately can get an upolstry person to customize the seat for you, but I am sure it will be expensive.