Proficiency Bonus Modifier and Limited Use Tags
As usual, I'm unsure where to ask these sorts of things, but I was designing some content, and it brought me back to a question I've had for a long time: is there an extension that allows you to add or subtract from a character's proficiency bonus in 5E? I know no core content interacts with it, but there are things I might consider building for 5E and certain styles of play that might benefit from having it (to emulate that old level-drain sort of feeling).
Related; has anyone considered making an extension that adds a [Porificiency] or [Half Proficiency] option to the options for uses, like where [Daily] and [Rest] are? Many features would benefit from being able to lock them to those fields. Specifically, many racial features that have per-Long-Rest uses are based on your proficiency bonus, and it would be useful for a set-and-forget way of dealing with this.
Again, sorry if this is in the wrong place. These are just quality-of-life things I think about, and if anything does these or anything here inspires thought, please let me know!