We did it back to back years after DS did Algebra 1 & 2 and Geometry in one year to see what kind of growth he gained on ACT in Math. We otherwise would not have bothered. He also doesn't mind testing or have any real anxiety associated with it. Unless you have a specific need for the information, I would take the year off.
On Ohio requirements, it seems like overkill all the test she was given. The state does not require all the additional GT testing. ODE has guidelines for the Superior Cognitive Ability label using Explore or ACT. The only required test is the annual OAA. OAA is a joke as you know and the grade level assessments using OLSAT & SAT wouldn't tell them much about curriculum levels. The state certainly doesn't require all of the testing they did. We had acceleration without it. My DS was required to take course exit exams in order to completely skip courses, but they were short and limited to the subject area. The exit exams were not required until he was skipping High School level classes. In the future, I would challenge them on the number of test they are administering to her. At the very least ask the administer testing aligned with the curriculum she is skipping over.