"Use global formatting only" button

Possibility of individual formatting every single word is interesting, but constantly comes into way. It is inconvinient.
Having option to check “use global formating only” would spare a lot of distractions during creative process. No remembering to match styles, no fighting with different line spacing etc.
Simple and elegant, just like in distraction-free editors (Writemonkey, FocusWriter for example).

I’m not sure I understand the question.

By default, every new document uses the global formatting. You certainly can apply additional formatting, but Scrivener doesn’t expect or require it.