I believe, not positive, that Marker Squire Demo bindings have negative delta (heel lower than toe) whereas Marker non-demo and nearly every other binding has some amount of positive delta.
Some people like
@MissySki love that negative delta for their flexible state and anatomic proportions. I don’t particularly, but I’ve skied it for a full day on heavy for me skis (Secret 96), and it forces different technique/muscle use for sure.
You’re on similar length as previous ski and not too long for your height and weight.
I think give it more days, drills, a lesson before coming to any conclusions.
Understanding how changes in equipment make you feel is part of becoming a better skier.