In looking at the very last line of photos on the 2nd page, you will notice the rears have been squared off in the front. This is normally done when the toes are too long but sometimes cannot be taken back more until some growth occurs. It is to keep the breaking over and not "pulling" the hoof as they move. Also, when they have been allowed to get so gnarly, the hoof capsule that encloses the coffin bone, etc., needs to reform to some degree. This didn't happen over short term and won't correct short term.
Don't know who either farrier is but, IMO, they have brought her along well. You must remember that once they grow out too long, while there is a great, great deal of hoof that has no feeling and can be removed, there is also a "quick" that is longer out than you would have in a horse which had been kept trimmed up all along. So, there is an amount that can comfortably be removed and then, best balance needs to be considered. Slowly the old hoof will grow out, be cut, and the new hoof walls will become more aligned. The hooves will take on more strength and can be shortened and re-shaped.
This can easily be expected to take a yr, IMO, to be fully removed. Talk to your farrier the next time he's out and ask him what he anticipates finishing out with, how long it should take, etc. Personally, I think the difference is dramatic and she is feeling better than you about it. :aktion033: There is some irratic wear on other feet if a couple are really off, as hers were. I'm saying that the fronts causing her to not be able to bear full weight would create some compensation by the rear legs/feet. Similar to how a horse stands when foundered, to displace weight. Now that she can walk freely and bear weight more evenly on all four, you will probably begin to see a more rapid improvement -- here ligaments, tendons and muscle will all begin to realign and rebuild, also. It isn't JUST about the hooves, it's the whole body. Think of it this way -- if you badly sprained an ankle and could not bear weight, used crutches, etc., you entire body muscle system changes to help you move, you get sore, etc. See what I mean? Well, she's been going through all that.
You're doing a great job with her. :aktion033: Keep up the good work.
Some of our farriers on here will be able to explain this in greater depth than I, I'm sure. I have read a great, great deal about corrective work....have done some of my own and trust me, it's slow and tedious but very rewarding when complete.