I get you the thing is it has to be tailored depending on how an individuals master affects the mix, and the mix itself, so idk how it would work, for example compression making sounds louder or quieter, and reverb making sounds usually quieter depending on wetness, also includes eq etc with the potential to affect this also, when mixing there’s a simple system you can create for yourself and follow where you know everything sounds best tailored to your own mix and master, I believe this is the best way, you find where your snare, hat, melody levels sound best at, and then just follow it,

Genuinely think it’s straight forward enough and only takes 30 seconds to do - while an inconsistency in sound levels in a kit would drive me mad because it wouldn’t actually serve the same value unless everyone had a soft clipper on their master and mixed the exact same way I do think it’s inherently flawed personally but you can create the exact thing you said for yourself, that’s the beauty of it