To give some context, my DS7 also has high VCI and PRI scores but his PSI was 9th percentile a year ago. Last year he was one of the slowest writers and rarely finished any assignment in class. He's improved a lot since then and is now to the point now where he blends in with his classmates and hasn't used the writing accommodations in his IEP for months.
A PSI of 98 is low compared to the rest of her scores but when you put her in a classroom of "average" kids it isn't likely to stick out especially with her other strengths to potentially compensate with.
