It's not my impression that all people diagnosed with Balo's necessarily have an aggressive course.
Here's an article Baló's Concentric Sclerosis: Clinical and Radiologic Features of Five Cases
We herein present five cases diagnosed as BCS based on their MR imaging findings, which were similar to those of other previously reported cases with antemortem diagnosis (9, 12, 13, 16).
All our patients had a benign course without further relapses within a mean follow-up period of 30 months (range, 6–47 months) (Table). Such an outcome has also been reported in recent cases, with some showing spontaneous remission, as seen in our first case (16, 22).
Most of the earlier cases with a progressive and fatal course were based on autopsy findings. Therefore, it is very likely that many cases with a benign course were either missed or misdiagnosed before the introduction of MR imaging into clinical practice.
There was also a more recent report from China: Balo's disease showing benign clinical course and co-existence with multiple sclerosis-like lesions in Chinese
This report presents seven Hans Chinese subjects diagnosed as BCS on the basis of the pathognomonic MR (magnetic resonance) findings.
Upon diagnosis, all the cases displayed good responses to corticosteroids and showed an overall benign prognosis during a follow-up period of 4-13.5 years, although three relapsed later.
MR findings suggest that the characteristic concentric lesions of BCS frequently (5/7) coexist with multiple sclerosis-like lesions.
During follow-up, the Baló-like lesions may either dissolve over time or transform into an MS-like lesion. Moreover, the Baló and MS-like lesions occurred one after another at the onset and relapse phases of the same patient in two cases.
I think it's a positive sign your symptoms aren't too bad yet.
Best to you