I have vasculitis. To be honest, it doesn't give me any complications as long as I'm controlling it with prednisone. I do sometimes get little "splinter hemorrahges" on my nails, which is an indicator that it's acting up, but usually I notice them go away on their own.
There really isn't anything to worry about as long as you're getting it treated properly. Sometimes, even a low dose of prednisone is enough to treat it. Is your vasculitis severe? What symptoms are you getting?
I know that going on prednisone isn't something you want to do. But if it's necessary to keep you alive, you have to do, what you have to do. Vasculitis can cause a lot of serious issues, but when treated properly, you should have no problems.
Hope this helps!