Has she had any visual/perceptual testing?
My dd has been to specialist after specialist, test after test and a laundry list of potential diagnoses over the last three years.
We finally found a Neurodevelopmental Optometrist (2nd opinion) that pinpointed DDs visual issues that impacted her writing-reversals,messy, poor copying speed, etc etc.
She is now in vision therapy a month and I can see improvements!
www.covd.org - to find a qualified DO in your area.
This may not be what you need, but just a thought.