If you already have a good understanding of your DD's learning profile (and I think you do), then the primary value of an updated eval moving forward will be as documentation facilitating access to accommodations at the post-secondary level, and for precollege testing (SATs/ACTs/AP exams). In which case, you probably need to wait until she is at least 16, so she can have an adult test administered to her (such as the WAIS--probably the 5th edition by then, slated for publication in the next two years). Although College Board and ACT will take the WISC, colleges almost always want an adult test, administered no more than three years prior.
It might be helpful to start investigating the kind of post-secondary opportunities that would interest her, and scoping out the documentation they would require in order for her to access the appropriate accommodations.
