I was also suffering with this heel pain. I started observing patterns of its occurances. I notice it occured most often on weekend. Then I realized that on weekends when I go out, I wear shoes. This, even though fits me comfortably and snugly, and though not tight, it was causing the discomfort. I used floaters last weekend, just to see the effect. And true enough, there was no pain at all.
Maybe this could be a silly explanation

, but do observe patterns, then we might find some interesting possiblity like this.