what's are megs faults and how can her faults help her on her next mission?

I like this excerpt,

So Meg feels all wrong...how is she going to get to be all right, or at least more right with herself than she currently is? Mrs. Whatsit suggests it's all a matter of perspective:

"Meg, I give you your faults."

"My faults!" Meg cried.

"Your faults."

"But I'm always trying to get rid of my faults!"

"Yes," Mrs. Whatsit said. "However, I think you'll find they'll come in very handy on Camazotz." (6.82-86)

By presenting Meg's faults as strengths, Mrs. Whatsit offers Meg a new way of perceiving herself: as someone who just needs a face-off with a giant brain to show her mettle. The very things that got Meg in trouble at home – her stubbornness, her rudeness, her tendency to be unmanageable and headstrong – turn out to be great weapons for brain-poking.

So all Meg needs is a little self-perception adjustment and maybe a giant brain to do battle with occasionally to keep her hand in, right? Well, not exactly. While Meg's faults are useful when directed at IT, they're less of a plus when they're aimed at her own allies.

Idk