honestly this car has the most invasive traction system I've ever experienced in my life. I'm not claiming to be super experienced (I'm not) - but I have some brief experience in FWD, RWD and AWD in summer tires + in the snow. nothing deeper then 3-4 inches
this past winter I took my wrx out in the snow with summer tires and I felt so much more comfortable and in control with traction control off.. it felt like it literately just disengaged your ability to control the car at all, but awd/powering out let you correct a slide much sooner.
'when in doubt, power out' - deserves some tinkering and testing in the snow, your mileage may vary, and I found what I preferred. this is my first AWD vehicle - my wife has had a legacy for a couple of years though and I've found the same results in her car. it should go without saying but please - if you are going to test this out - find an empty parking lot. : P