I would say they should be comfortable in ski position as they will be snug, hopefully and exact fit so that you ‘could’ ski in them with your buckles undone.
When on the chairlift or in the resturant you would probably want to pop the buckles as your foot will shift a little forward out of ski position, so there would be pressure on the top of your foot. That’s how it works in my Technicas anyway.
Not sure you need super stiff boots nowadays – many coaches teach ankle flex as part of a turn and you also weight the middle of the ski more on a turn than in the old days as you want to pressure both the nose and tail of the ski into the snow to make the turn, whereas older skis only had wide noses so you had to pressure forward and skid the back round more.