Good feedback here everyone. I too second a narrow stance in crud. Makes skiing more solid. Less prone to upset balance as mentioned here above. But its individual. I'm used to a narrow stance from way back so it comes naturally for me.
For me tipping is "tipping the ski on its edge". As an isolated movement like this if you are going straight it allows the ski to run along its edge and turn according to its sidecut. This is how we initiate an edge locked carved turn. In crud it doesn't work that well because the base is not solid enough to support the edge pressure and bend the ski. What usually happens is that the ski just keeps on going straight forwards. Or at its best it starts to turn very slowly making a wide arc with no or very little possibilities for adjusting the turn radius. However, in combination with other movements tipping would increases edging. Tip rocker skis would improve the turning of a ski in crud. And wider skis platform better against a softer snow base. My experience with wider rocker skis is that it makes things a bit easier and some times different but the basic technique is still the same.
IMO tip pressure is very important since a brushed/steered turn builds on the principle that the tip causes more friction. And by increasing tip friction the turn radius can be made tighter.