On a lighter/softer ski earlier in the day the ski felt it was getting deflected and bucked while I stayed composed and balanced. When I switched to the bigger stiffer ski and skied faster/aggressively the ski would track like I wanted, and I was balanced upper body and I would pressure the front but all that did sometimes was flex my shins forward but not affect the ski instantly. Like the boots flexed more (or earlier) than the ski.
Like you suggested though, this is my first season in a non 4-buckle boot so maybe I'm just noticing the slightly different flex.
Still had a great time in them, and no pain/numbness while still totally locked down is just so nice.
Bookmarks