I don't feel I am experienced enough to give you any advice, although from the pictures I can spot a few things that seem "wrong". I look forward to seeing Loosie's thoughts on your mare's condition.
I'd be very interested in seeing her x-rays, if you had any way to post them on here. From the front/side view it would appear as though her feet are terribly long, but the sole view shows that she really can't go any shorter at this point either. This is something I dealt with initially with Amarea's Rain as well. Careful trimming and booted riding has helped some of Rain's inner structures recede back into the hoof capsule quite a bit in a fairly short time. Ricci's toes seem very long, and her quarters sure look like they could be a bit shorter, especially in light of the flaring and separation at the white line. How long has the current farrier been working with her? Remember a hoof doesn't grow all that quickly, it can take a good amount of time to see results from what is being done. I'd sure like to see a more exaggerated rolled edge and the breakover brought a bit further back though.
ETA - in response to your edit lol. Freyja has some lasting unsoundness off and on, although believed to be caused initially from her hoof problems, the soreness that crops up is resulting arthritis from hobbling around for so many years. Her hooves are now sound, but her joints sustained some damage in the meantime. However if you had a nerve block that demonstrated the pain was limited to the hoof, I should think you are still dealing with a hoof problem.