You usually convey a bunch of info and intent when referring to someone (how close you're to that person and their social position relative to you), and pronouns don't easily cover that range. It can be done but requires more finesse.

That's perhaps why pronouns are so tainted (You=anata has become the most stereotypical way to call one's husband)

The better choice is usually to omit the subject and just imply who you're talking about. Using their name is the second best alternative.