I don’t think it will ultimately help a diabetic. More worrisome then loss of feeling is loss of circulation. With High blood sugars you’re essentially get sugar crystals that build up on the capillary walls, which prevent blood circulation. Even if you cure Neuropathy will still have the issue of poor circulation.
But with neuropathy, which causes loss of feeling, pain… in the feet for example, you can ignore damage that combined with a loss of blood circulation capabilities can make things deteriorate very badly (necrosis, amputation).