Steering Control

[Cruise]

I have noticed that the steering on my '07 Allure / Lacrosse, doesn't seem to return as smooth as other vehicles I have owned.
Specifically, if I am making a turn, it feels like the vehicle would continue to turn, unless I turned the wheel back straight. Usually the momentum of the car would help the steering straighten out.

Since this is my first winter with the car, I also notice that it does not handle well in slush or a few inches of snow.
Again I am comparing this to other mid size cars that I have driven, that had all season tires on it.
I brought the vehicle in for warranty work, however they claim the vehicle is fine.
Anyone else have this issue with their car?