[Question] Generating a novelty scale

I was writing a post when I thought “this isn’t very novel. I should mark it as such.” It then occurred to me to make a 1–10 scale to describe how novel a piece is, similar to Gwern’s importance tags. However, I’d prefer an objective scale, not a rank scale that Resorter generates. If I never write anything super-duper-new, I shouldn’t have any 10s on the novelty scale.

Currently, I have a rather coarse four-point scale with points that aren’t uniformly distributed between their neighbors:

  1. A verbatim copy of something else.

  2. Demonstrating how to apply a technique publicly documented elsewhere.

  3. Slightly generalizing an idea publicly documented elsewhere.

  4. Paradigm-shifting reconceptualization akin to Newton figuring out that the same thing causes apples to fall from trees and planets to stay in their orbits.

I’m trying to flesh out this scale as best as I’m able, but I’d like to get some help if I can. I’m also trying to separate novelty from both utility and importance. For example, “hold the banana by the handle end, pinch the other end to make a crack in it, and peel it starting at the crack” is no more than a 1.1 on the novelty scale, maybe a 4 on the utility scale, and 2 or so on the importance scale.

Are there any other useful points on a novelty scale?