Hello Chuck,
Like you my balance is compromised due to PN. I am taking Tai Chi from a highly skilled teacher who breaks the poses into their component elements. He uses motion to help us feel the movement in greater detail. I think this is helping my balance. Also, I found Dansko shoes. They are a Scandanavian shoes that gives me a greater sense of the ground. The shoe is highly structured and I think its sense of stability has saved me from a couple of falls. I uses to think a shoe with a sparse sole would be best but now my opinion has greatly changed.