Thanks - so practically, what you’re suggesting, is to map this example (the Chimney on Striding Edge, a “public footpath” in English legal jargon, and a grade 1 scramble in the British grading system) with a tag to say it’s a climbing route e.g. climbing=route and with climbing:grade:uiaa=1 but without a highway= tag?
Here’s a video of the descent.
I’m not sure if you’re discussing highway=scramble vs. highway=path or if you’re discussing foot_scale=scrambling vs. sac_scale=alpine_hiking vs. climbing:grade:uiaa=1. I see the two (highway classification and difficulty grading) as somewhat separate questions.