So... The m/l imbalance is obvious, BUT without further knowledge, I'm not going to say it's *necessarily* wrong. Look at the line through the middle of the limb - the whole(visible) leg is on an angle, appears horse is base narrow. It could well be 'imbalanced' because the horse *wants* to be imbalanced, due to body issues. The farrier should NOT just cut a 'square' foot onto a crooked body.
And hooves are flared, 'stretched' forward, but in order to nail rims onto a foot, if that foot is not 'tight', then the farrier, even if he knows better, often must make compromises, in order to have enough wall to nail to. He has
rasped off the very lower portion of the flares, but of course, he couldn't address them adequately at ground surface, without removing too much to fit a shoe to.
But so saying, the shoe is too big for the foot, if it was fit right. I've drawn lines on the foot, to show *very
roughly - can only guess from this pic* approx where the heel platform & breakover 'should' be. I do believe, regardless of necessary compromises for shoes, that this should be adhered to, rather than the shoe fit to the foot as the farrier has found it. And then, as more of an idea, I shifted the shoe back in the pic... and made it shorter & narrower, as it would fit to a 'tight' hoof capsule.
The other thing is, if the shoe is flush with the sole, meaning there's permanent pressure on the sole, this can cause pain/damage, esp when soles are already thin. Flexible shoes can negate that problem.
Guess his feet are what they are for now. He can't be ridden barefoot hoof boots don't work. So I'm stuck with not great work.
Yes, if your priority is for shoeing conventionally & riding the horse, without ensuring hooves are healthy first, at the amount/on terrain that causes you to feel hoof boots or other alternatives aren't worth it, then to a certain degree, you're stuck. Even the best shoeing job, if using steel peripheral rims, with be compromising the hooves further.