How old are your shoes pcad? I had a lot of problems with sore feet while riding with Speedplays last summer. I tried all sorts of adjustments, custom shoe insoles, and even a Look-style pedal without any resolution. I finally bought a new pair of shoes to replace my old shoes that had 15,000 miles on them. The new shoes were noticeably stiffer, due in part to their carbon soles. I went back to the Speedplays, and I liked them much better than the Look imitators. I may still switch to another brand of shoes as I have wide feet and I sometimes get a hot spot on the outside edge of the middle of my foot, but that is related to the shoes, not the pedals.
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The rider in my avatar is David Etxebarria, not me.