Personally, I would have been more conservative with my trim. But given that I do not know this horse, its environment and other factors without seeing it, it is a hard call to make online. He has some issues going on (frog atrophy, possible negative plane, forward distortion of the hoof capsule, M/L imbalance, what appear to be abscesses, etc). One thing I would have done regardless is left more wall thickness on this guy, given that they are thin already. The after pictures look too beveled, especially at the toe and quarters, like the entire wall was stripped away. The sole of the hoof isn't meant to carry all of the weight; The walls need to offer protection and support too (not so much in front of breakover at the toe, but everything behind that point). Right now, it looks like he is dropped on his sole all the way around with the exception of the heels, which look like they could be taken down a hair in some pictures.
What do his footfalls look like? Any hoof tester response?