I think I would address the nock fit before I did any thing else, although it seems you've gotten a lot of very good advice. I could hear the nocks snap on, and when I can hear something, it's pretty loud. Also, you might try the Saunders Pak-Tab, which you can build up yourself, with optional layers of different materials, to achieve the feel you want. Since I tried one several years ago, I've used nothing else, and numb fingers are a thing of the past, which can only be a good thing.
Murray