Now, I don't know what a horse's feet are "supposed" to look like after shoes have been pulled, but I do know what they should look like to be barefoot and these aren't it.
Maybe the farrier didn't want to do too much all at once, but the sole is overgrown, not allowing air circulation around the frog or proper movement either. I would suspect thrush as well, but you'll have a heck of a time trying to get rid of it with the frog so blocked in (first pic). Definite deterioration of the white line (1st more than 2nd), probably due to dirt and bacteria being trapped between the hoof and the shoe.
The heels look higher in the second picture, as opposed to the first where the heels are just slightly high. Is it just me, the pics, or is your farrier really trimming your horse so uneven from foot to foot?
Whether or not these are the problems, I can't tell you, but I advise you have someone else come out and look after your horse's feet -- at least while he is barefoot. Trimming for shoes and trimming for barefoot are two different methods. Your horse is not setup for barefoot right now. And with the white line as it is, I wouldn't put shoes back on either. Nice that she is getting a break for the winter.