I only feel qualified to address the hydrocodone question. There is no perfect pain reliever for neuropathic pain. I take a low dose of oxycodone, and will probably stay with this, increasing the dosage as needed over time, maybe switching to time release types. It works for me in that it allows me to get more done with less discomfort. It improves my quality of life, which is what pain relief should be about. It does not remove the pain or discomfort but it keeps it fom taking over my life.
I have a hereditary, large and small fiber neuropathy, with muscle loss, so very different fom yours, but it sounds as if your hydrocodone is working for you. Please do not worry about addiction issues. They are not highly relevant in chronic pain situations like ours and all effective pain relief has this potential,but the benefits outweigh the risks. From your description, addiction is not something you should worry about.