As a counterpoint to your part on parallel structures, the first example smells a lot like an unrefined rhetorical figure: the tricolon - the easiest example of those might be "I came, I saw, I conquered." In the words of Mark Forsyth in The Elements of Eloquence: "Tricolons sound great if the third thing is longer." I kinda feel like you're either riding a bit hard on the parallel structure part, or not explaining it in enough depth - here's a rewrite that plays with the rhythm of it in a different fashion:
She's got good grades, great looks, and she's very popular among the students.
I kinda cheated with the italics changing the meaning, not to mention removing "all" which might be significant as well, but hey I'm trying to prove a point not be useful ¯\_(ツ)_/¯. Point is, I make sure to stress very to (imperfectly, sadly) mimic the initial stress structure of each third of the sentence.
...With that said, rhetorical figures are often employed to make things memorable or stand out, which is not necessarily your aim at all times.