[imglorp]

Not an expert, but I think this means your foot is sliding across the ground.

I do not develop blisters nor callouses because the feet are not landing hard and they're not sliding.

A couple of observations then. First, you can't bring your old form and start cold. Be prepared to work up to it by walking and gradually adding running. Second, the new form involves a more bent-knee, hopping, springy aspect. This vid was very helpful for me: https://www.youtube.com/watch?v=Jio7DK15Q1E

It's funny that we learn how to run in diapers and then spend decades learning again.