I suggest adding two buttons:
"Reset to default" and "Reset to OptiFine-like"

The latter is described on https://github.com/Fabulously-Optimized/wiki/blob/main/en-us/give-up-optifine.md

I'm up to switching to a better settings lib if there is one.

Not possible with cloth config

Hmm, I thought (manually built) Cloth Config was more flexible than its AutoConfig but you seem to be right. I'll let you know when I get an idea on how to do it.

It is but not that flexible

This was in OkZoomer even in older versions using cloth.

Implemented poorly using a dropdown setting.

Closing for now until either cloth adds buttons or someone suggests a better config library that can do this.