I think it is a safe generalization to make that Sugar is not good for neuropathy. I have never seen this rejected. Even sugar from fruits - while may have health benefits will exacerbate the pain associated with the condition.

Low carb can go too far. Glucose does have a function in survival in the body. I have been low carb since my diagnosis. But at maintenance level (30 - 60 carbs per day). I also eat a ton of fiber rich foods to help counteract the effects of the sugars I do eat. Staying in pure ketosis (20 carbs or less per day) will take its toll over time and the body will demand more carbohydrates for its proper functioning.

I personally have always found it is the best diet and lifestyle. But, like the article says, you do what your body responds to best. That's what has always been a great fail safe for me whenever I have had any health concern.