Why won't the Copaxone work? It's not an interferon like Betaseron, Avonex, and Rebif. If it's working, how come he's considering changing it?
None of the drugs, that I know of, will make the lesions go away. It may help with slowing down the progression of the disease, but it won't make damage go away (unfortunately).
I'd find out about why he wants you to switch your medicine, if it's doing it's job.