I competed, coached, and judged back when Shane’s original IFSA judging system (which I still have a hard copy of) was much more prescriptive, as you describe. The evolution in the IFSA judging criteria (substituting style and energy for aggressiveness, changing the line and control score limits etc) is a topic of its own.
The FWT, which evolved from the Verbier Extreme (initially only snowboarding), utilize a completely different judging system, which no matter how closely I read and try to make sense of it, and despite some impressively detailed guidance on note taking for scoring airs, ultimately comes down to the judge’s completely subjective overall impression. It’s presumably got something to do with applying the same criteria to snowboarding and skiing, but also has the quite reasonable intent of ensuring that skiers with as diverse an approach as Bilous and Mumma can contend for a win, it’s just that in the absence of a truly standout performance, even fans as obsessive as we are can’t understand or agree on the rankings.
The judging handbook:
https://www.freerideworldtour.com/si..._15.12.203.pdf
Obscure Castle reference:
https://www.youtube.com/watch?v=nMuh33BMZYY