We have a teenager with similar diagnoses and he is doing very, very well. I know it is always hard to have these kinds of concerns about your child confirmed, but I would encourage you to try to keep it in perspective. Some of the labels real are just fancy ways of saying stuff you already knew - you already knew she's clumsy, not that well coordinated, with a stronger mind than body, etc. The job of the OT is to come up with scientific ways to document these deficits so insurance will pay for therapy.
I'm glad the labels exist because insurance companies won't pay vague stuff like clumsy or weak, but I would keep in mind that it doesn't mean she's headed for big time trouble. There have always been smart uncoordinated kids who had terrible handwriting. The good news is that now we have ways of understanding those deficits and offering some help.
What therapy can do is help improve her strength and help her find ways to maximize what she does have. Perhaps it would help to think of it like an academic subject. Some kids are naturally not great at math and need tutoring. Tutoring probably won't make them a math contest winner, but it'll likely help them struggle less.
If you have the option to get a neurology or neuropsych assessment that's not a bad idea. I understand the desire to fix it and fix it now, but I don't know that there is a single one right assessment or therapy. I'd suggest trying out a few things and seeing what works. Everyone's situation is different. We found working on core strength with physical therapy and exercise has been helpful because it can really help improve stamina.
Neurologists have really encouraged us to look at nontherapy activities too especially those that encourage patterned movements, coordination, and strengthening. The most common suggestions are swimming, martial arts, yoga, dance, and horseback riding. We have seen significant improvements with these activities. It may also be worthwhile to look a little at diet and supplements. Omega 3 (fish oil) in particular seems to sometimes help some of the kids with these soft neurological symptoms.
