Be interested to see some different angles, particularly sole shots, because it's difficult to tell from those angles & on soft ground what has been done. I'm inclined to agree with Sharpie & not sure how much better they are, but without seeing/knowing the whole picture...
It's great if you have a good farrier & you trust him... that can be a huge battle for people! But as with opinions & advice on the net & elsewhere, there are a lot of average/poor ones out there & even among the good ones there are a variety of very different opinions, so my advice is don't trust & take the word of anyone blindly, but do your own research, so you know what's what & can make educated decisions about what to do, which professionals & approaches to go with, etc.
So saying, here's my 'but one opinion'...
e-hoofcare.com hoofrehab.com & barefoothorse.com are a few good sources of more info to start with for more info.
I can't tell if the bottom of the walls were bevelled strongly on the hinds, to relieve the flares, which I would have done. As per the lines I've drawn to show where the hoof walls 'should' be & emphasise the flares, There is a lot of separated/stretched material that needs to be kept relieved in order for the strongly attached growth to come down.
I don't know whether you wanted front shoes on the horse or the farrier suggested it, but I believe they're contraindicated, for now at least, for this situation, because the walls desperately need relief, not to be put under even more pressure. IME it will be much easier & quicker to get her feet in shape without shoes, & they'll then also be strong & balanced enough to cope with shoes if/when they're desired, without doing further damage. I would be keeping her on yielding footing & only light riding for her now, until her hooves are in better shape, particularly if she is to stay shod for some reason.
Are you treating the cracks? I'd be soaking them in an antiseptic solution - t-tree or very strong saline is good. Of course with only those pics to go on, not sure, but especially as she's come from a wet environment too, they look to me as if a few could need opening up(resecting) in order to properly treat infection.
The farrier's only concern is that he feels some of the cracks are going to always be there no matter what we do because he suspects multiple abscesses were allowed to go long enough to come through the hoof wall.
What makes him suspect that about abscesses? Yes, if cracks go through the coronary border and are severe or long term, the hooves can end up with permanent hairline cracks, or generally just shallow grooves or 'fault lines'. But with good management, they're very minor & a non even. Your horse could possibly have a couple of permanent grooves, but overall(& based only on these pics of course) it doesn't look like it to me & they all appear fully treatable.
You said the farrier said her heels are non existent? Can't tell from the pics but in some I can see they are also very flared & appear possibly high. Perhaps they, as with the rest of the walls have 'gone splat'? In that case especially, I generally find they're best kept short, to at/near the sole plane. Usually I don't 'bevel' them much, as with the rest of the wall if it's stretched/separated but I am also careful to dig/cut out any wall infection as necessary & treat assertively, because I find it can be even more insidious in the heels & quarters, below the lateral cartilages.
One of the fronts appears quite upright & high heeled, but more flared than the other? One or both may always 'need' to be upright & higher heeled(clubby) than 'ideal', but the flared/stretched front half of the hoof still needs to be balanced. Depending on the level of club(can't tell if, let alone how much at all from those pics) and the soles, it may also be prudent to provide protection for the front of the sole &/or pad under the frog(not heels) for extra support there.
tack her up, she swung to bite me. Turns out little miss mare has a sore back now from getting back into work. So now we need a saddle fitting and chiro appt! WOOHOO for getting a horse! lol :)
Shouldn't be just from getting back into 'work', unless it's very strenuous or otherwise way too much for her, but yes, saddle fitting & other rider issues are common causes. The BALANCE website
is one good source of info on saddle fitting & design.