We've had situations where groups of students were enrolled in the wrong grade for coming years. Our current situation: admin decided that a grade level would be under a different division/dept going forward, necessitating the creation of a new grade level under the appropriate school level. Students' enrollment rows need to be updated.
The Create Future Enrollment import can't overwrite existing enrollment, only add new, so we have to manually change 50+ students' enrollment one by one.
An import would make this much easier.
We have encountered this issue as well and in some cases have needed to contract with Blackbaud for a data fix to resolve this problem. This should be something that a data import can easily handle.