The Mayo clinic has done a study some time ago -- I tried to find it on line, but couldn't (probably because I'm not real skilled at that!)
that led them to the conclusion that they, as a matter of practice, won't prescribe one of the CRAB's early in the course of the disease, but rather wait until a larger exacerbation occurs, "justifying" the drug. They looked backwards at a number of patients with MS, those severely impaired, those with only mild impairments. According to their study, some folks never got significantly worse, never had a large exacerbation, and the cost (physical and financial) of the drug might not have been warranted.
I'm of the belief that the earlier one starts the drugs the better. Why risk a large exacerbation that may leave you with significant disability? Sure..there's a chance that you won't have such a flare...but is it worth the risk? Not for me, it isn't.
Note, though, that none of the meds promises to stop ALL exacerbations, or stop ALL progression. It could well be that even if you do start on one of the drugs immediately, you could still, 6 months from now, have new lesions, or have suffered an exacerbation. All that they're promising is to *reduce* the number of flares. The Mayo clinic doesn't support that promise.
Indeed, talk this over with your new neuro, but in the end, it really should be you who makes the choice. Good luck!
...I am not a doctor, nor health professional, and don't pretend to be one, here.....