I agree with Stillhoping that 2 doses of IVIG isn't enough to determine it's effectiveness. Keep in mind that IVIG works by modulating the immune system...this takes time.

Being that the steroids helped, confirms that your neuropathy is inflammatory based. You may be a candidate for long term (lower dose) steroid therapy. Of course, this comes with higher risk of negative side-effects from steroids. Have you tried a week course of steroids...normal taper pack starting at 40 mg and tapering down? You would know within a couple days if this will help. And you may actually be able to take 10-20 mg daily and get good results.

Worth a try...and to give IVIG more time.

By the way, I have taken Cellcept before and had good results during the few months I took it. However, I got a life threatening infection and had to stop (I am immune deficient, so that complicated things---others may not have this problem). It's worth considering.