His foot is raised slightly above the floor in that pose with a 2 degree bend, which I didn't notice until I looked at the renders closer. Because of the rounded shapes on the bottom it can look like its on the floor properly in preview and I can't always tell until rendered. I usually try to adjust the figure so that the feet bottoms are just barely penetrating the ground plane but I didn't think to do it with that render, it was just a quicky to show the latest version. So I'm going to do some flattening morphs for bare foot standing poses to help mitigate that sort of thing. Would be nice if there was a way to automate it with collision detection but I don't think there currently is. At least not without some sort of script. But I agree, the top rise, whatever it's technical name is, is probably a bit too high. People's feet are about as unique as fingerprints, or at least ears and eyes. Their shapes are molded over years of supporting body weight, combined with what type of shoes they wear, if any, and how they walk, etc. Most references look more than a bit deformed to me, so it can be tricky to find decent ones.

I spent some time reshaping them a bit, and I adjusted the pose so that it is definitely on the floor. The previous version (that I rendered above) is on the left here, and the new one is on the right. Changes were subtle enough not to affect rigging that I've found, and I think they look a bit better now. But if they don't then tell me.