Sounds to me like alignment-as-radar-chart adds a whole lot of bookkeeping for not a lot of value.

(And you'd still have arguments about alignment, is TN 0s across the board or anyone who has an exact balance on their chart?)

The problems with D&D alignment are that it hangs on out-of-game understandings of concepts that philosophers have been arguing about without settlement for as long as they have existed and that paying attention to it is either mandatory or irrelevant depending on your class. Not that it doesn't have enough decimal places.

A "functional" alignment system is one that's deeply bedded into the themes and fiction like Humanity in V:TM or Dark Side points in Star Wars. There's no ambiguity about what they represent and it's usually pretty obvious when you would gain or lose points on the scale.

But I don't think you can universally bolt a mechanic like that on to D&D in general. (You could use it in Ravenloft though, because Ravenloft is a setting with opinions about that sort of thing).