I don't think my communication became more precise. Language is imprecise and in these cases (ESL), you are also limiting your vocabulary. (Especially when I moved outside the US - while I was around very educated people who studied for the GRE, learning a word is not the same as digesting all connotations.

So in social communication, you aren't getting more precise -- in many cases, you're getting less precise and taking more words to handle that. Consider the idiom "shit or get off the pot." You can say that "Make a decision" is less precise. "Do it or don't" is also an idiom but doesn't express the frustration that the vulgarity does. "I am frustrated and need you to either take action or shut up" is more direct and possibly more offensive because it takes formality.

And then there's the prefix of "Sometimes you need to" that turns it from a command to advice. "Sometimes you need to either take action or stop complaining" sounds like the emphasis is on "you" instead of the predicate as if it's a critique of the person, whereas the idiom gives more of a proverb connotation.

The problem is that language carries many layers and "more precise" is a goal in technical communication but neglects the other layers.