An ordinary pronoun often avoids repetition. In departure from the expected form, however, a pronoun can create a moment of anticipation that a plain noun would not produce in the same way. The hearer receives a preliminary indication and waits for the full statement.
In praise, amazement or an important report, withholding the name momentarily can generate suspense. But if the reference remains so obscure that the intended meaning cannot be recovered, the expression is weakened rather than enhanced.
A rhetorical interpretation therefore requires a reliable path by which the audience can understand the intended reference, not mere obscurity for its own sake.