Somebody ( I don't recall whom ) makes a pedal with a inside-to-outside tilt on the cleat surface. Normally, when toes are significantly splayed out, the foot is also flat, and the leg-bones are partially bowed. This causes the ankle to meet the foot at less than right angles. The geometry also causes the toes to splay out and the foot to "flop over" the instep over time.
I don't know your geometry, but the above describes mine perfectly. On platform pedals, my feet touch the pedal at the outside of the pedal only. The inside of my shoe never meets the pedal surface.
I haven't tried the angled pedals personally, because I prefer to ride platforms, but if the pedals sound like they could help you, you might seek them out.
Good luck!
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Nishiki road bike, Raleigh road bike, Electra Cruiser Lux 7d, Electra Townie 3i, Electra Townie 1, Whatever I find today!