To me, “cut” is a 100% power cut (or in the case of ProofGrade, 100% depth), and “score” is just variable power (or for ProofGrade, variable depth).
It shouldn’t be more difficult than what they already did for engraving… to have an operational toggle of 100% power (“cut”) vs. variable power (“score”). To cut, you’d just say “any non-white path color is now a cut operation”. To power-level score, use the greyscale value.
Engraving is similar already, just for area: you have either a fixed power setting with patterned dither, or engrave based on variable power matched to the greyscale.
Where it really pays of (in terms of scores/cuts) is that now I don’t have to create multiple operations with different power levels on an imported design, if I chose to.