Hmmm, I like the nubs! If those shoes were made specifically for diabetic feet, don't you think they'd have taken the sensitivity into consideration? Wouldn't hurt to just try them on...
Diabetic Comfort Shoe
Protective toe cap, elevated heel rim and super soft foot bed
The Cloud, by CrocsRx, is specially designed with the diabetic foot in mind. The super-soft foot bed provides a gentle environment for sensitive feet, while the roomy toe box allows for use of a heavy sock without creating any tightness or pressure points on the foot. In addition, the protective front toe cap and elevated heel rim protect the diabetic foot from stubb(ing?)
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"...I'm like the cycling version of the guy in Flowers for Algernon." Mike Magnuson